1. Strabismus surgery among aged Medicare beneficiaries;Repka;J AAPOS,1997
2. Reasons for delay of surgical intervention in adult strabismus;Coats;Arch Ophthalmol,2005
3. The utility of strabismus in adults;Beauchamp;Trans Am Ophthalmol Soc,2005
4. Medicare Enrollment: National Trends 1966-2010. 2011. Available at: http://www.cms.gov/MedicareEnRpts/Downloads/SMI2010.pdf.
5. Physician ICD-9-CM: International Classification of Diseases, 9th Revision, Clinical Modification,2011