TY JOUR TI ON THE ISSUE OF TRENDS AND CAUSES OF INFANT MORTALITY KW infant mortality KW neonatal mortality KW level of effectiveness of antenatal and postnatal prevention of infant mortality JO CASPIANJOURNALOF MEDICINE AND PHARMACY AU Shapovalova, M.. AU Boyko, Y.. AU Ugurchieva, K.. AU Abramova, D.. AU Ezhaev, A.. PY 2022 IS 3 PB Astrakhan State Medical University