A.I. ZIATDINOV, S.A. SENEK, G.R. YARULLINA  Children’s Republican Clinical Hospital, Kazan  Contact details: Yarullina G.R. – Head of the Health Center Address: 140 Orenburgskiy trakt, building 2,  420138, Kazan, tel.: (843) 229-06-31, e-mail: [email protected] According to the World Health Organization, schoolchildren are the most vulnerable group of population by the impact of risk factors of […]