S.V. BALALIN, T.G. EFREMOVA, V.N. POTAPOVA The Volgograd branch of the S. Fyodorov Eye Microsurgery Federal State Institution, 80 Zemlyachki Str., Volgograd, Russian Federation, 400138   Balalin S.V. ― Doc. Med. Sc., Head of the Research Department, tel. (8442) 58-16-44, e-mail: [email protected] Efremova T.G. ― Cand. Med. Sc., Head of the Department of Vitreoretinal Surgery, tel. […]