N.V. KORNEVA, А.А. STARSHINOVA, YU.E. OVCHINNIKOVA, Е.I. POTAPENKO, О.А. YAKUNOVA, I.PH. DOVGALYUK St. Petersburg Scientific and Research Institute of Phthisiopneumology of the Ministry of Health of the Russian Federation Starshinova Anna Andreevna Candidate of Medical Science, Head of Phthisiopulmonology Department 2-4 Ligovsky avenue, Saint Petersburg 191036 tel. 8-905-204-38-61, e-mail: [email protected] The article presents the results of a survey of 152 children aged 3 […]