N.A. MARCHENKO, A.V. NALYOTOV Gorky Donetsk State Medical University, Donetsk, Donetsk People’s Republic Contact details: Nalyotov A.V. — MD, Professor, Head of the Department of Pediatrics No. 2 Address: 16 prospekt Ilyicha, Donetsk, Donetsk People’s Republic, Russian Federation, 283003, tel.: +7-949-311-13-82, e-mail: nalyotov-a@mail.ru  The purpose — to determine the level of vitamin D availability and to […]