V.I. Torshin - Dr.Sc. (Biol.), Professor, Head of Department of Human Physiology, Peoples - friendship University of Russia. E-mail: vtorshin@mail.ru
Geda Semu Mengistu - Post-graduate Student, Department of Human Physiology, Peoples - friendship University of Russia. E-mail: semu.mengistu@yahoo.com
A.E. Severin - Dr.Sc. (Med.), Professor, Department of Human Normal Physiology, Peoples - friendship University of Russia. E-mail: aesever@mail.ru
Mansur Numman - Ph.D., Competitor of the Chair of Normal Physiology, Peoples - friendship University of Russia. E-mail: d-64-158@mail.ru