V. A. Serov
Ulyanovsk State University, Ulyanovsk
Russian Federation

Corresponding author: Valeriy A. Serov, MD, PhD, Professor, Ulyanovsk State University, L. Tolstoy street, Ulyanovsk, 432027 Russia. Phone: + 7 (8422)55–27–08. E-mail: Valery_serov@mail.ru

A. M. Shutov
Ulyanovsk State University, Ulyanovsk
Russian Federation

MD, PhD, DSc, Professor, Head, Department of Internal and Professional Diseases, Medical Faculty

D. V. Serova
Ulyanovsk State University, Ulyanovsk
Russian Federation

MD, PhD student, Department of Internal and Professional Diseases, Medical Faculty

S. V. Shevchenko
Ulyanovsk Central City Hospital, Ulyanovsk
Russian Federation

MD, Head, Cardiology Department

E. U. Shmelkova
Ulyanovsk Central City Hospital, Ulyanovsk
Russian Federation

MD, Deputy Chief Physician