Hassabi, M., Fakhri, M., Salehi, S., Abedi Yekta, A. H., Poursaeid Esfahani, M., Malekifar, P. and Javadi, F. (2021) “Association between physical activity and severity of diabetic retinopathy in patients with diabetes mellitus”, Researcher Bulletin of Medical Sciences, 25(1), p. e8. Available at: https://journals.sbmu.ac.ir/index.php/rbms/article/view/34669 (Accessed: 20September2021).