The Diabetic Retinopathy Vitrectomy Study Research Group. Early vitrectomy for severe proliferative diabetic retinopathy in eyes with useful vision. Results of a randomized trial: Diabetic retinopathy vitrectomy study report 3. Ophthalmology. 1988, 95, 1307-1320
The Diabetic Retinopathy Vitrectomy Study Research Group. Early vitrectomy for severe vitreous hemorrhage in diabetic retinopathy. Four-year results of a randomized trial: Diabetic retinopathy study report 5. Arch Ophthalmol. 1990, 108, 958-964