TY JOUR TI Laboratory Parameters of Bone Metabolism in Premature Infants and Children Born Using In Vitro Fertilization KW JO Bulletin of Rehabilitation Medicine AU Druzhinina, N.. AU Merzlyakova, D.. AU Vakhitova, G.. AU Shangareeva, Z.. AU Khabibullina, A.. AU Hafizova, N.. AU Shagarova, S.. PY 2021 IS 20 PB Federal State Budgetary Institution «National Medical Research Center of Rehabilitation and Balneology» of Ministry of Healthcare of Russian Federation