Effect of macular ischemia on intravitreal ranibizumab treatment for diabetic macular edema - Douvali, Maria; Chatziralli, Irini P; Theodossiadis, Panagiotis G; Chatzistefanou, Klio I; Giannakaki, Emmanouella; Rouvas, Alexandros A (Ophthalmologica, 2014)