 
			
					ISSN Print 2713-0878   
					ISSN Online 2713-0886				
				
				
				BIOMEDICAL JOURNAL OF ERMC EASTERN EUROPEAN
			 
			Yaroslavl State Medical University, Yaroslavl, Russia
Correspondence should be addressed: Valery M. Ganuzin
 Revolyutsionnaya ul., 5, Yaroslavl, 150000, Russia; ur.relbmar@nizunagv
Author contribution: Ganuzin VM — research supervision, collection of material, article authoring; Maskova GS — literature analysis, statistical processing.