Intravitreal growth factors in proliferative diabetic retinopathy: correlation with neovascular activity and glycaemic management. - Boulton,M.; Gregor,Z.; McLeod,D.; Charteris,D.; Jarvis Evans,J.; Moriarty,P.; Khaliq,A.; Foreman,D.; Allamby,D.; Bardsley,B. (Br J Ophthalmol, 1997)