1. International diabetes foundation;IDF,2016
2. International diabetes federation;IDF,2015
3. Diabetic retinopathy – an update;Alghadyan;Saudi J Ophthalmol,2011
4. International diabetes federation;IDF,2013
5. The effect of intensive treatment of diabetes on the development and progression of long-term complications in insulin-dependent diabetes mellitus;Control;N Engl J Med,1993