Instituto Nacional de Estadística (INE) [Portugal]; 2019.Annual Statistics Portugal – Childbirths. Deliveries (No.) by Place of residence of mother (NUTS – 2013) and Place (Delivery); Annual. 2018 [online database]. Lisbon: Instituto Nacional de Estadística (INE) [Portugal]; 2019 (https://www.ine.pt/xportal/xmain?xpid=INE&xpgid=ine_indicadores&indOcorrCod=0008349&contexto=bd&selTab=tab2, accessed 10 February 2020). 