TY JOUR TI The Effect of the Vitamin D Receptor on Bone Metabolism Disorders in Premature Infants Born Using In Vitro Fertilization KW JO Bulletin of Rehabilitation Medicine AU Druzhinina, N.. AU Merzlyakova, D.. AU Hafizova, N.. AU Gorbunova, V.. AU Imaeva, L.. AU Vahitova, G.. AU Khalikova, L.. PY 2021 IS 20 PB Federal State Budgetary Institution «National Medical Research Center of Rehabilitation and Balneology» of Ministry of Healthcare of Russian Federation