E.K. VALEYEV, S.V. OGURTSOV, I.E. VALEYEV, T.A. BIKMULLIN Republic Clinical Hospital of the MH of RT, 138 Orenburskiy Trakt, Kazan, Russian Federation, 420064 Valeyev E.K. — D. Med. Sc., Associate Professor, Chief Researcher, tel. +7-987-296-88-52, e-mail: [email protected] Ogurtsov S.V. — neurosurgeon, tel. +7-917-853-95-86, e-mail: [email protected] Valeyev I.E. — Cand. Med. Sc., neurosurgeon, tel. +7-987-296-88-51, e-mail: […]

I.E. VALEYEV, G.G. YAFAROVA, E.K. VALEYEV Republican Clinical Hospital of the Ministry of Health of the Republic of Tatarstan, 138 Orenburgskiy Trakt, Kazan, Russian Federation, 420064  Valeyev I.E. — PhD (Medicine), Head of the Department of Neurosurgery № 2, tel. +7-987-296-88-51, e-mail: [email protected] Yafarova G.G. — PhD (Medicine), Leading Researcher of Scientifc-Research Department, tel. (843) 237-35-23, e-mail: [email protected] […]

N.M. GRUBER, E.K. VALEYEV, R.G. KUZNETSOVA, G.G. YAFAROVA, D.Z. MITYUKOVA, I.E. VALEYEV Republican Clinical Hospital of the Ministry of Health of the Republic of Tatarstan, 138 Orenburgskiy Trakt, Kazan, Russian Federation, 420064,  Gruber N.M. — PhD (Biology), Leading Researcher of the Research Department, tel. (843) 237-35-23, e-mail: [email protected] Valeyev E.K. — D. Med. Sc., Chief Researcher of Scientific-Research Department, tel. +7-987-296-88-52, e-mail: [email protected] Кuznetsova R.G. — […]

N.M. GRUBER, E.K. VALEYEV, V.G. DERBYSHEVA, I.E. VALEYEV Republican Clinical Hospital of the Ministry of Health of the Republic of Tatarstan, 138 Orenburgskiy Trakt, Kazan, Russian Federation, 420064  Gruber N.M. — PhD (Biology), Leading Researcher of the Research Department, tel. (843) 237-35-23, e-mail: [email protected] Valeyev E.K. — D. Med. Sc., Chief Researcher of Scientific-Research Department, tel. +7-987-296-88-52, […]

A.P. SKVORTSOV1, A.N. BAKLANOV2, B.Yu. BARCHENKO2, P.S. ANDREYEV1, I.E. VALEYEV1, R.F. KHASANOV1, I.V. YASHINA1 1Republic Clinical Hospital of the Ministry of Healthcare of the Republic of Tatarstan, 138 Orenburgskiy Trakt, Kazan, Russian Federation, 420064 2Center for Spinal Surgery, 21a Gubkin St., Russian Federation, Salavat, 453265 Skvortsov A.P. — D. Med. Sc., Chief Researcher of scientific-Research Department, tel. (843) 296-31-40, e-mail: [email protected] Baklanov A.N. — Cand. Med. Sc., Head of Center […]