E.L. BORSHCHUK1, A.D. CHUPROV2, A.O. LOSITSKIY2, A.S. FIRSOV1 1Orenburg State Medical University, 6 Sovetskaya Str., Orenburg, Russian Federation, 460000 2Orenburg branch of S. Fyodorov Eye Microsurgery Federal State Institution, 17 Salmyshskaya Str., Orenburg, Russian Federation, 460047   Borshchuk E.L. ― D. Sc. (medicine), Professor, Head of the Department of Public Health and Healthcare, tel. (3532) 77-30-53, […]