[1] PeoplesFriendship Univ Russia, RUDN Univ, Educ & Sci Inst Neurosurg, Moscow, Russia
[2] Sechenov First Moscow State Med Univ, Sechenov Univ, Dept Neurosurg, Moscow, Russia
[3] Republican Clin Perinatal Ctr, Ufa 450106, Russia
[4] Sichuan Univ, West China Hosp, Gastr Canc Ctr, Chengdu, Peoples R China
[5] Tyumen State Med Univ, Dept Obstet & Gynecol, 54 Odesskaya St, Tyumen 625023, Russia
[6] Bashkir State Med Univ, Dept Internal Dis, Ufa 450008, Russia
[7] Harbin Med Univ, Affiliated Hosp 1, Dept Neurosurg, Harbin 150001, Peoples R China
[8] Peoples Friendship Univ Russia, RUDN Univ, 6 Miklukho Maklaya St, Moscow 117198, Russia