V.F. Pyatin - Dr.Sc.(Med.), Professor, Head of Department of Normal Physiology, Samara State Medical University, Russia. E-mail: pyatin_vf@list.ru
M.S. Sergeeva - Ph.D. (Biol.), Assistant Professor, Department of Normal Physiology, Samara State Medical University, Russia. E-mail: marsergr@yandex.ru
I.V. Shirolapov - Ph.D. (Med.), Senior Lecturer, Department of Normal Physiology, Samara State Medical University, Russia. E-mail: ishirolapov@mail.ru