1. The natural history of diabetic retinopathy;Davis;Trans Am Acad Ophthalmol Otolaryngol,1968
2. Proliferative diabetic retinopathy: evolution of the retinal lesions;Dobree;Br J Ophthalmol,1964
3. Mid-peripheral fundus involvement in diabetic retinopathy;Shimizu;Ophthalmology,1981
4. A modification of the Airlie house classification of diabetic retinopathy: report 7;Diabetic Retinopathy Study Research Group;Invest Ophthalmol Vis Sci,1981
5. Guidelines for the management of diabetic retinopathy;Royal College of Ophthalmologists,2012