[1] Privolzhsky Res Med Univ, Minist Hlth Russian Federat, Nizhny Novgorod Res Inst Hyg & Occupat Pathol, Federal State Budgetary Educ Inst Higher Educ, Nizhnii Novgorod, Russia
[2] Privolzhsky Res Med Univ, Minist Hlth Russian Federat, Federal State Budgetary Educ Inst Higher Educ, Nizhnii Novgorod, Russia