E.V. PSHENICHNAYA Donetsk National Medical University named after M. Gorky, 16 Illyich Ave., Donetsk, Ukraine, 283003 Рshenichnaya E.V. ― Cand. Med. Sc., Assistant Professor, Head of the Department of Pediatrics of the Faculty of Internships and Postgraduate Education, e-mail: [email protected] The article presents the results of a survey 547 male adolescents aged 15-16 y.o., who […]