1. Scleral buckling versus primary vitrectomy in rhegmatogenous retinal detachment: a prospective randomized multicenter clinical study;Heimann;Ophthalmology,2007
2. American Medical Association. cpt® Code/Relative Value Search. Available at: https://ocm.ama-assn.org/OCM/CPTRelativeValueSearch.do. Accessed January 20, 2013.
3. Centers for Medicare and Medicaid Services—Anesthesiologists Center. Available at: http://www.cms.gov/Center/Provider-Type/Anesthesiologists-Center.html. Accessed January 20, 2013.
4. Centers for Medicare and Medicaid Services—Ambulatory Surgical Centers (ASC) Center. Available at: http://www.cms.gov/Center/Provider-Type/Ambulatory-Surgical-Centers-ASC-Center.html. Accessed January 20, 2013.
5. Scleral buckling versus primary vitrectomy in rhegmatogenous retinal detachment study (SPR study): multiple-event analysis of risk factors for reoperations. SPR Study report no. 4;Heussen;Acta Ophthalmol,2011