Pearls in Ophthalmology Article Archive

Volume 6 Issue 1 - November 2011

Residency & Fellowship Pearls

Practice & Clinical Pearls

Business & Management Pearls


Do you have a story, interesting article, or eye case? Submit your article to the editor. Contact us to become a Sponsor of Pearls in Ophthalmology or Post Your Job Opening. Pearls in Ophthalmology is published quarterly and is read by thousands of ophthalmology residents, fellows, and ophthalmologists starting their practice. In 2011, Pearls in Ophthalmology received over 73,000 page views.

Volume 5 Issue 3 - October 2010 AAO Annual Meeting Issue

AAO Annual Meeting Pearls

Practice & Clinical Pearls

Announcements

July 2010 Volume 5 Issue 2 Photo Quiz

What is the most common organism causing the following diagnosis? (click on image for larger view)

Submit your answer and subscribe to Pearls in Ophthalmology. Correct answers will be included in a drawing for a $100 Amazon.com Gift Card. Please include PIO Photo Quiz Oct 2010 in the subject line of your email to webmaster@medrounds.org. Include your name, e-mail, and your current position. By submitting your answer, you agree to the PIO Quiz Official Rules and Regulations.


Do you have a story, interesting article, or eye case? Submit your article to the editor. Contact us to become a Sponsor of Pearls in Ophthalmology or Post Your Job Opening. Pearls in Ophthalmology is published quarterly and is read by thousands of ophthalmology residents, fellows, and ophthalmologists starting their practice. In 2009, Pearls in Ophthalmology received over 73,000 page views.  

 

Volume 5 Issue 2 - July 2010

Practice & Clinical Pearls

Surgical Pearls

Residency & Fellowship Pearls

Technology Pearls

Ethics Pearls

Announcements

July 2010 Volume 5 Issue 2 Photo Quiz

The patient has an one-piece intraocular lens, presents with an intraocular pressure of 30, and the following is seen on slit lamp examination. What's the diagnosis?

Click on image for larger view

Submit your answer and subscribe to Pearls in Ophthalmology. Correct answers will be included in a drawing for a $100 Amazon.com Gift Card. Please include PIO Photo Quiz Feb 2010 in the subject line of your email to webmaster@medrounds.org. Include your name, e-mail, and your current position. By submitting your answer, you agree to the PIO Quiz Official Rules and Regulations.


Do you have a story, interesting article, or eye case? Submit your article to the editor. Contact us to become a Sponsor of Pearls in Ophthalmology or Post Your Job Opening. Pearls in Ophthalmology is published quarterly and is read by thousands of ophthalmology residents, fellows, and ophthalmologists starting their practice. In 2009, Pearls in Ophthalmology received over 73,000 page views.  

Volume 5 Issue 1 - February 2010

Doheny Eye Institute & Jules Stein Eye Institute 5th Annual Comprehensive Ophthalmology Review Course - March 11-14, 2010

OKAP and Ophthalmology Boards

* 10 Pearls to Prepare for Success on the OKAP Exam by Purnima S. Patel, MD

* Golden Pearls for the OKAP Exam by Ashley N. San Filippo, MD and Vinay A. Shah, MD

* How to Approach the OKAP Exam as a First Year Resident by Brad Feldman, MD

* OKAP Preparation Pearls by Sami Kamjoo, MD

* Studying for the OKAP Exam and Written Boards: Follow your personal style of learning by Arlene Bagga, MD

* OKAP/Boards Review Books by Vipul Shah, MD

* What courses are available for OKAP and Board preparation? by Molly Ritsema, MD

 
Practice & Clinical Pearls

* “Dry” Age Related Macular Degeneration Pearls by Rahul Khurana, MD

* Premium Intraocular Lenses and Astigmatism Management (Podcast) by Rob Melendez, MD, MBA

* Corneal Surgery and H1N1 Flu by David A. Goldman MD and Jonathan Etter MD


Pitfalls in Ophthalmology

* Risk Factors for Retained Nuclear Fragment by Anonymous


Technology Pearls

* Include the EMR in Your Evaluation of A Practice by Craig Wilkerson, MD

* Smartphones in Ophthalmology: Potential Uses of the Smartphone in Your Practice by Vinay A. Shah, MD, Ron K. Lord, MD, and Ashley N. San Filippo, MD

* What's the Buzz About Social Networks? by Andrew Doan, MD, PhD

* Compendium of Useful Ophthalmology Resources on the Web


Business and Management Pearls

* The 411 for 2010 by Lyn Walsh

* Avoid First-job pitfalls: Eight questions to ask a potential employer by Lance J. Kugler, MD


International Ophthalmology

* Foreign Medical Graduates & Ophthalmology Residency Success Stories by Vinay A. Shah, MD

* Entering a Residency in Ophthalmology: My Experience by Florin Grigorian, MD


Ethics Pearls

* How and when do you share with a patient they had a complication during surgery? by Damien Luviano, MD

* Waking Up Blind - Lawsuits Over Eye Surgery - New Book by Tom Harbin, MD


Health and Wellness

* Why Endurance Sports Come Naturally to Ophthalmologists by M. Kelly Green, MD


History of Ophthalmology

* Leonard Apt, MD


Announcement

* Winner of Vol 4 Issue 4 Photo Quiz


Feb 2010 Photo Quiz

What's the diagnosis? - click on image for enlarged view -



Submit your answer and subscribe to Pearls in Ophthalmology. Correct answers will be included in a drawing for a $100 Amazon.com Gift Card. Please include PIO Photo Quiz Feb 2010 in the subject line of your email to webmaster@medrounds.org. Include your name, e-mail, and your current position. By submitting your answer, you agree to the PIO Quiz Official Rules and Regulations.



Do you have a story, interesting article, or eye case? Submit your article to the editor.
Volume 4 Issue 4 - October 2009 Annual Meeting Issue

Academy Pearls: How to maximize your experience at the AAO Annual Meeting 2009 in San Francisco

Pearls on Places to Eat & Visit While in San Francisco by Michael G. Haas, MD

Top Sites to See in San Francisco by Brooke Strickland

Stay Organized and download a spreadsheet to keep track of your courses, meetings and interviews: Excel (for PC and Mac) and Numbers Spreadsheet (Mac)

Top 10 Tips on Getting Your First Job by Relief Jones, III, MD

Staying Fit, Fed and Fully Rested for the Annual Meeting by Kelly Green, MD

Managing Stress During The Job Search by Brooke Strickland

Interviewing for Your First Job While at the Academy by Molly Ritsema, MD

Questions to Ask During Your Interview While at the Academy Meeting by Michael G. Haas, MD

Pearls for interviewing for your first position at the AAO Annual Meeting by Cristina Boggiano

Interviewing Pearls for New Physicians by Brooke Strickland

PIO Editor’s Courses for the AAO Annual Meeting 2009

Ideal Courses to Attend at the AAO Annual Meeting on a Budget by Michael Haas, MD

Annual LASIK Course at the Annual Meeting by George Waring, IV, MD


Practice Pearls

Corneal Topography Pearls by Vipul Shah, MD

Focus Marketing Efforts on Physician Community: The Referral Source That Keeps on Giving by Carey Reynolds, MBA


Pitfalls in Ophthalmology

Introduction to Pitfalls in Ophthalmology

Cornea Pitfalls

DSAEK and Corneal Transplant Mishaps by Anonymous

Cataract Pitfalls

Why do I keep getting iris prolapse during cataract surgery? by Rob Melendez, MD, MBA


Technology Pearls

Smartphones in Ophthalmology by Ron K. Lord, MD and Vinay Shah, MD
Fellowship Pearls

Pearls for Applying to Vitreoretinal Fellowships by Rahul Khurana, MD

Business and Management Pearls

Financial Pearls for Young Ophthalmologists and Doctors
by Rob Melendez, MD, MBA

Announcement

Winner of Vol 4 Issue 2 Photo Quiz

September 2009 Photo Quiz (Continuation)


What is the diagnosis?

Submit your answer and subscribe to Pearls in Ophthalmology. Correct answers will be included in a drawing for a $100 Amazon.com Gift Card. Please include PIO Photo Quiz September 2009 in the subject line of your email to webmaster@medrounds.org. Include your name, e-mail, and your current position.By submitting your answer, you agree to the PIO Quiz Official Rules and Regulations.


 

Do you have a story, interesting article, or eye case? Submit your article to the editor.

Volume 4 Issue 3 - September 2009

Practice Pearls


Dry Eye Pearls 101 by Vipul Shah, MD

Reading an OCT 101 by Rahul Khurana, MD

Coding Pearls

Surgical Pearls

International Ophthalmology

International Ophthalmology Opportunities by Vinay A. Shah, MD and Srinivas Iyengar, MD

Pearls from Program Directors

PIO Case Report

Eye Care in the News

Big Bucks - The Physician-Pharma Relationship by Brooke Strickland


Announcement

September 2009 Photo Quiz

What is the diagnosis?
 
Submit your answer and subscribe to Pearls in Ophthalmology. Correct answers will be included in a drawing for a $100 Amazon.com Gift Card. Please include PIO Photo Quiz September 2009 in the subject line of your email to webmaster@medrounds.org. Include your name, e-mail, and your current position.By submitting your answer, you agree to the PIO Quiz Official Rules and Regulations.

New Book Releases from FEP International:




 


Do you have a story, interesting article, or eye case? Submit your article to the editor.
Volume 4 Issue 2 - June 2009
Practice Pearls

“I AM A LEADER” by Lawrence Y. Ho, MD

Marketing Pearls: Is the Market ready for the promotion of presbyopia-correcting IOLs? by Lance Kugler, MD

Networking Pearls by Kathy Mayo, DO

Building Relationships: Rules for Self-Promotion by Bob Teale

Keratorefractive Excimer Procedures by George Waring IV, MD

Refractive Laser Ablations on the Cornea: Understanding new Terminology in Refractive Surgery by Renato Ambrósio Jr., MD, PhD and Frederico Guerra, MD

Refractive Surgery Pearls: Pre-operative Planning for IntraLase Enabled Keratoplasty (IEK) by Sumit Garg, MD and Roger F. Steinert, MD

Starting Your First Year of Practice by Molly Ritsema, MD

Technology Pearls: Devices to Make Life Easier by John Kitchens, MD


Coding Pearls

Coding by Time in Ophthalmology by George Mayo, MD

How to maximize Reimbursements by Anne Dwyer, COMT, OCS


Job Searching Pearls

How to recession-proof your search for an Ophthalmology Position by Cristina Boggiano


Health and Wellness Pearls

Health and Wellness Pearls for the Eye Surgeon and Physician Vary your Workouts by M. Kelly Green, MD


International Ophthalmology

Training Opportunities for Foreign Medical Graduates (FMGs) by Vinay A. Shah, MD and Rahul Bhola, MD


History of Ophthalmology

Who was Marc Amsler? by Nate Roybal, MD, PhD

Who was Allvar Gullstrand? by Frank Tsai, MSIII


Announcements

Winner of Feb 2009 Photo Quiz and Answer


Photo Quiz June 2009

(Click on image for larger view)


This patient has severe vision loss and an abnormal retina from an inheritable disease. What is the diagnosis?

Submit your answer and subscribe to Pearls in Ophthalmology. Correct answers will be included in a drawing for a $100 Amazon.com Gift Card. Please include PIO Photo Quiz June 2009 in the subject line of your email to webmaster@medrounds.org. Include your name, e-mail, and your current position.

By submitting your answer, you agree to the PIO Quiz Official Rules and Regulations.



Do you have a story, interesting article, or eye case? Submit your article to the editor.
Volume 4 Issue 1 - February 2009
Pearls in Ophthalmology welcomes Nate Roybal, MD, PhD from the Jules Stein Eye Institute, our History of Ophthalmology Senior Editor, and Vinay Shah, MD, our International Ophthalmology Senior Editor and Editorial Board Member.

This Issue Sponsored By:

[Get more info about the Doheny Eye Institute and Jules Stein Eye Institute Review Course]

OKAP and Board Examination Pearls

Practice, Clinical and Surgical Pearls

History of Ophthalmology

International Ophthalmology

Announcements

Photo Quiz Feb 2009

What are the diagnoses for the corneal topographies shown in (A) and (B) below:

Submit your answer and subscribe to Pearls in Ophthalmology. Correct answers will be included in a drawing for a $100 Amazon.com Gift Card. Please include PIO Photo Quiz Feb 2009 in the subject line of your email to webmaster@medrounds.org

By submitting your answer, you agree to the PIO Quiz Official Rules and Regulations.



Do you have a story, interesting article, or eye case? Submit your article to the editor.

Volume 3 Issue 3 - October 2008 Annual Meeting Issue

Pearls in Ophthalmology welcomes Lance Kugler, MD, PIO Cataract/Anterior Segment Senior Editor.

View our current Editorial Board members.

Academy Meeting 2008 Pearls

Interviewing at the Academy By George O. Waring IV, MD

ACING the INTERVIEW By Lyn Walsh and Wayne Ganong

Questions to Ask During Your Interview While at the Academy Meeting By Michael G. Haas, MD

Navigating the Annual Meeting By Don Sauberan, MD

What to Bring and Wear for the Resident Who is Interviewing for a Job By Molly Ritsema, MD and Rob Melendez, MD

Packing Light for the Academy By Kathy Mayo, DO

Your Curriculum Vitae and Cover Letter By Chris Ketcherside, MD

First Time Attendees of the AAO Annual Meeting: Efficiently Navigating Your First AAO Annual Meeting By Lance Kugler, MD

Residency and Fellowship Pearls

Fellowship Interview Pearls By Lawrence Ho, MD

Cataract Surgery Pearls for the Young Ophthalmologist By Robert F. Melendez, MD

Practice, Clinical and Surgical Pearls

Retinal Imaging: The Future is Bright with New Technologies By John W. Kitchens, MD

Opening a Private Ophthalmology Practice – Points to Consider During the First Three Months By George L. Mayo, MD and Kathy Mayo, DO

Health and Fitness Pearls for the Ophthalmologist: Ergonomics By Kelly Green, MD

How optometrists and ophthalmologists can help each other in a group practice By Amy Watts, OD and Cara Morris, OD, FAAO

Pearls on Preparation: When a Natural Disaster Strikes-Hurricane Ike By Aaron Miller, MD, MBA

Improving Patient Care and Confidence in You as the Physician By Anne Dwyer, COMT

PIO Grand Rounds

Presentation By Molly E. Ritsema, MD and narration by Robert Melendez, MD

Announcements

National Federation of the Blind Launches Largest-Ever White Cane
Initiative


Photo Quiz November 2008

What is the diagnosis?


Submit your answer and subscribe to Pearls in Ophthalmology. Correct answers will be included in a drawing for a $100 Amazon.com Gift Card. Please include PIO Photo Quiz Nov 2008 in the subject line of your email to webmaster@medrounds.org

Volume 3 Issue 2 - July 2008

Residency and Fellowship Pearls

Practice, Clinical and Surgical Pearls

PIO Grand Rounds

Announcements

  • Craig Wilkerson, MD (one of our PIO editorial board members) will be speaking at the AAO meeting: Reality 101: Real World of Ophthalmology.

  • Rob Melendez, MD Receives AMA Award (Submitted by Andrew Doan, MD, PhD)

  • Do you have an announcement to share with our community? Please send it to: editor@eyepearls.com

Photo Quiz

Can you name structures in the eye that have this hexagonal pattern?

Answer

Volume 3 Issue 1 - April 2008

OKAP and Board Examination Pearls

Practice, Clinical and Surgical Pearls

What's the diagnosis?


Answer

Volume 2 Issue 3 - November 2007 Annual Meeting Issue

Annual Meeting Issue

Program Director Spotlight

Professionalism

Surgical Pearl

Volume 2 Issue 2 - September 2007
General Pearls

Pearls for Residents

Pearls for Practicing Ophthalmologists

Volume 2 Issue 1 - March 2007

 

Volume 1 Issue 2 - December 2006

Our Vision for Pearls in Ophthalmology. By Rob Melendez, MD (Chief Editor)

Clinical Case Report - Mycobacterium fortuitum keratitis. By Ruben Sanchez, MD

Surgical Pearl: Use of Capsular Tension Ring for Lens Subluxation during Phacoemulsification. By Mark Packer, MD

Program Review - University of Michigan, Kellogg Eye Center, Residency Program in Ophthalmology. By Jeff Zink, MD

Tips for a Successful Residency. By John Kitchens, MD

Tailoring Your Internship to Your Future as an Ophthalmologist. By Paul A. Sanchez, MD, MS

Pearls of Wisdom for Surviving the First Two Years in Ophthalmology Residency. By Parisa Farhi, MD

Interview Pearls. By Rob Melendez, MD

Fellowship Applications and Interviewing: Tips for Success. By Aaron Miller, MD, MBA

Life as Chief Resident at Bascom Palmer. By John Kitchens, MD

Advocacy on a shoestring. By John King, MD

Transition Into Private Practice. By Daniel Simon, MD

Do you have a story, interesting article, or eye case? Submit your article to the editor.

Volume 1 Issue 1 - June 2006

ARTICLES

Welcome to Pearls in Ophthalmology by Andrew Doan, MD, PhD

Medical School and Internship

How to Survive your General Internal Medicine Ward Months by By Ruben N. Sanchez, MD
Read about tips that will help you survive and excel during your internship.

Residency

Free Online Educational Resources for Eye Care Providers by Andrew Doan, MD, PhD
The internet offers numerous educational resources in ophthalmology. This article lists excellent educational resources for students, residents, and ophthalmologists.

What books do I need for residency? by Andrew Lam, MD
Dr. Lam is the Chief Resident at the Wills Eye Hospital, and he provides book recommendations for residency and board review.

Digital Photography For Residents - For the Slit Lamp and On Call by Andrew Doan, MD, PhD, Michael Boland, MD, PhD, and Thomas Oetting, MD
Armed with a compact digital camera, residents provide better documentation of cases and deliver outstanding presentations for morning rounds. Learn how to use a digital camera to capture slit lamp and clinical photos.

Katrina brings Farzad Jake Khoubian, M.D. to Southern California
Read an interview about a resident who became displaced by Katrina which then led him to the Jules Stein Eye Institute.

Fellowship

Fellowship E&M (Evaluation and Management) for Aspiring Retina Fellows by James G. Howard, MD
Dr. Howard is a retina fellow at the University of Iowa. This article provides insight into retina fellowship for those of you who are aspiring retinal specialists.

Eye Care in India by Sudeep Pramanik, MD, MBA
Dr. Pramanik is finishing his cornea fellowship at the Univeristy of Iowa, and he discusses opportunities in international ophthalmology.

Practicing Ophthalmologists

Oral Board Examination Pearls by Lisa Reaves, MD
Dr. Reaves provides tips and pearls on how to survive and pass the oral boards. If you are taking the oral boards this fall or in the future, then you should bookmark this page.

Finding a job in academic ophthalmology by Michael Boland, MD, PhD
Are you considering a career in academic ophthalmology? Dr. Boland, an assistant professor at the Wilmer Eye Institute, writes about his experiences with searching for an academic position. This article contains pearls helpful in planning your academic career search.

Building your Practice and Reputation by Rob Melendez, MD
This article provides guidelines for young physicians interested in developing a robust practice and solid reputation. Incorporate Dr. Melendez's suggestions, and you will be a better physician for your patients, staff, and colleagues.

 

 

By Brooke Strickland

In this cross-sectional study, researchers studied individuals in Sweden between the ages 55 and 79. The study took place over a five year period and a total of 32, 918 subjects were surveyed. Researchers registered the age, sex, and amount of visual field loss in subjects with previously undiagnosed glaucoma identified at the screening. The goal of the study was to assess the prevalence and severity of undetected glaucoma.

The results showed that among the screened subjects, who were 77.5% of all invited subjects, a total of 406 subjects (1.23%) were identified with previously undetected glaucoma. Pervasiveness increased with age (0.55% at 55-59 years to 2.73% at 75 to 79 years). Approximately 66% of the cases were identified with unilateral disease. Some eyes had early (35%) or moderate (31%) glaucomatous visual field defects. In addition, nearly one-third of subjects had advanced visual field loss in at least one eye. (1)

What to take away from the study: There is an increased risk of undetected glaucoma as patients get older, but the severity of the disease did not increase in subjects that were age 60 or older.

 

Source:

(      Hejil, Anders, MD, PhD., Bengtsson, Boel, PhD, Oskarsdottir, Sigridur Erla, MD. “Prevalence    and Severity of Undetected Manifest Glaucoma: Results from the Early Manifest Glaucoma Trial Screening. Ophthalmology. Manuscript no. 2012-1212. Published online April 29, 2013. Accessed April 30, 2013. http://www.aaojournal.org/article/S0161-6420%2813%2900058-4/abstract

 

 

By Brooke Strickland

This study was published by the Journal of Cataract & Refractive Surgery and was conducted at three private practice study sites. A calibrated force gauge was used on healthy patients during cataract surgery to apply measured and calculable amounts of force to the eye. The first study showed the alteration in IOP during 1 oz of external force – this is approximately the same amount of force exerted when rubbing the eye. For the other studies, the force gauge (also with 1 oz of external force) was used to evaluate the amount of leakage from clear corneal incisions that were exposed to sutures or stromal hydration. There were no complications that arose during these studies.

The first study’s results: the mean IOP rose from a baseline of 17.49mm Hg to 43.44 mm Hg. The second study showed a leak rate of 67% for the main incision. The overall leak rate for the third study (sutures) using up to 1.00 oz of force was a little over 23%. (1)

What to take away from this study: 1 oz of force is a realistic measure of what a patient may feel when rubbing the eye. Following clear corneal cataract surgery, if a patient rubs their eye with this amount of force for three seconds, there is an increased chance of wound leakage.

Source:
Masket, Samuel, MD., Hovanesian, John, MD., Raizman, Michael, MD., Wee, Daniel, MD., Fram, Nicole, MD. "Use of calibrated force gauge in clear corneal cataract surgery to quantify point-pressure manipulation." Journal of Cataract & Refractive Surgery. Volume 39, Issue 4, Pages 511-518. April 2013.  Accessed April 23, 2013. http://www.jcrsjournal.org/article/S0886-3350%2812%2901664-1/abstract


 

 

By Brooke Strickland

This study was completed in order to find out the risk factors associated with central retinal vein occlusion (CRVO) among patients of different gender and varying ethnicity.

To find candidates, insurance billing codes were used to find individuals that had recently been diagnosed with CRVO. Participants were 55 years old or younger.

The results revealed that there were several risk factors for CRVO such as glaucoma and hypertension. Other defined variables included: male gender, black race, peripheral artery disease, hypercoagulable state, stroke, and complicated diabetic macular edema. Blacks had a 58% increased risk of CRVO when compared to whites and women had a 25% decreased risk of CRVO compared to men. Stroke increased the risk by 44% and hypercoagulable state had a 145% increased CRVO risk. The study also provided new answers on previously inconsistent findings on the link to CRVO and people with end-organ damage from hypertension or diabetes mellitus. Individuals with damage from hypertension had a 92% increased risk and those with diabetes mellitus had a 53% increased risk of CRVO. (1)

What to take away from this study: Vascular diseases show increased risk for developing CRVO. In addition, the black race also has higher risk for CRVO. There is also a clearer explanation with consistent results for linking CRVO development to diabetes mellitus and hypertension damage. Using this information, doctors can better identify patients with the highest risk for CRVO.

Source:
Stem, Maxwell, S., MD, Talwar, Nidhi, MA, Comer, Grant, M., MD, MS, Stein, Joshua, D., MD, MS. "A Longitudinal Analysis of Risk Factors Associated with Central Vein Occlusion." Ophthalmology. Volume 120, Issue 2, Pages 362-370, February 2013. Accessed April 25, 2013. http://www.aaojournal.org/article/S0161-6420%2812%2900743-9/abstract

 

 

 

By Brooke Strickland

Patients that have smaller pupil diameters won’t see much benefit from the implantation of aspheric IOLs, says a new study published by the American Journal of Ophthalmology. Researchers measured pupil diameter on 86 patients (169 eyes). Then, based on the measurement, researchers looked to see what the effects were of spherical aberration correction by aspheric IOLs.

This was a cross-sectional study that separated patients into two groups. One group was implanted with the HOYA AF-1 NY-60 IOL and the other group with the Tecnis ZCB00 1-piece IOL. The outcome showed that for individuals with pupil diameters smaller than 3.4 mm (in the Tecnis group) and 3.7 mm (in the HOYA group), the spherical aberration correction with these specific IOLs was ineffective.

Aspheric IOLs were designed to help minimize spherical aberration, and with the results of this study, physicians will be able to measure the pupil and more effectively determine if a patient’s pupil size is too small to see real results after implantation of the lens.

Youngub Eom, Eunjoo Yoo, Su-Yeon, Kang, Hyo-Myung Kim, Jong-Suk Song. "Change in Efficiency of Aspheric Intraocular Lenses Based on Pupil Diameter." American Journal of Ophthalmology. Volume 155, Issue 3, Pages 492-498 e2, March 2013. Accessed April 9, 2013. http://www.ajo.com/article/S0002-9394%2812%2900762-3/abstract

 

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