TY JOUR TI PURPOSE PROPHYLAXIS OF THE INSUFFICIENCY OF VITAMIN D IN THE POPULATION OF THE IRKUTSK REGION KW vitamin D KW hypovitaminosis and vitamin D deficiency KW 25(OH)D3 KW children KW skin phototypes KW ultraviolet radiation KW precipitation JO Acta biomedica scientifica AU Spasich, T.A. AU Reshetnik, L.A. AU Zhdanova, Y.Y. AU Chubarova, N.E. AU Promtov, M.V. AU Rumyantsev, K.S. AU Boskholov, B.V. PY 2018 IS 2 PB Scientific Center for Family Problems and Human Reproduction