A.V. TKACHEV, L.S. MKRTCHIAN, K.E. MAZOVKA, A.S. MAKARENKO, A.M. ASLANOV Rostov State Medical University,  Rostov-on-Don  Contact details: Tkachev A.V. — MD, Professor, Head of the Department of Propaedeutics of Internal Diseases Address: 29 Nakhichevanskiy per., Russian Federation, Rostov-on-Don, tel.: +7-918-557-11-73, e-mail: tkachev@aaanet.ru The article presents a review of modern literature on progress in the study of […]