S.V. MALTSEV¹, G.SH. MANSUROVA²  ¹Russian Medical Academy for Continuous Professional Education, Moscow ²Kazan (Volga) Federal University, Kazan  Contact details: Maltsev S.V. — MD, Professor, Honored Researcher of the Russian Federation and the Republic of Tatarstan, Professro of the Department of Pediatrics named after G.N. Speranskiy Address: 2/1 Barrikadnaya St., buil. 1, Moscow, Russian Federation, 123995, […]