For correspondence: Romantsova E.B. – D. Med. Sc., Professor, Head of the Department of Pediatrics Amur State Medical Academy, 95 Gorkiy Str., 675006, Blagoveshchensk, Amur oblast, tel. (4162) 31-90-09, e-mail: romantsova.06@yandex.ru The work presents analysis of research results of vitamin D metabolites in sickly children. It has been found that 81.2% of 3-6 y.o. pre-school […]