Hassabi, M. .; Fakhri, M. .; Salehi, S. .; Abedi Yekta, A. H. .; Poursaeid Esfahani, M. .; Malekifar, P. .; Javadi, F. . Association Between Physical Activity and Severity of Diabetic Retinopathy in Patients With Diabetes Mellitus. rbms 2021, 25, e8.