E.K. VALEEV, I.E. VALEEV Republican Clinical Hospital of the MH of RT, 138 Orenburskiy Trakt, Kazan, Russian Federation, 420064 Valeev E.K. — D. Med. Sc., Chief Researcher of the Research Department, tel. (843) 229-90-04, e-mail: ekv44@mail.ru Valeev I.E. — Cand. Med. Sc., Head of the Department of Neurosurgery № 2, tel. (843) 229-90-04, e-mail: ekv44@mail.ru […]