O.G. Pavlov - Dr. Sc. (Med.), Deputy Director Medical Institute of Tula State University. E-mail: dr_o_pavlov@mail.ru Y.A. Halin - Ph. D. (Eng.), Senior Lecturer, Southwest State University (Kursk). E-mail: yur-khalin@yandex.ru L.A. Lisitsin - Ph. D. (Eng.), Associate Professor, Southwest State University (Kursk). E-mail: leo_263@mail.ru