5Early Treatment Diabetic Retinopathy Study Research Group.Photocoagulation for diabetic macular edema.Treatment techniques and clinical guidelines for photocoagulation of diabetic macular edema.Arch Ophthalmol,1987,94:761.
6Early Treatment Diabetic Retinopathy Study Research Group,photocoagulation for diabetic macular edema.Early Treatment Diabetic Retinopathy Study Report Number.Int Ophthalmol Clin,1987,27:265-272.