First data from the new, unified database of the Hungarian case-control surveillance of congenital abnormalities. - Ács N; Mátrai Á; Kaposi A (The journal of maternal-fetal & neonatal medicine : the official journal of the European Association of Perinatal Medicine, the Federation of Asia and Oceania Perinatal Societies, the International Society of Perinatal Obstetricians, 2021)