Det Medicinske Fødselsregister (MFR), MFR-kuben, Institutional deliveries [online database]. Copenhagen: Sundhedsdatastyrelsen [National Board of Health Data, Denmark]; 2019 (https://www.esundhed.dk/Registre/Det-medicinske-foedselsregister/Foedte-og-foedsler-1997-og-frem#tabpanel61119A72216248AC86DB508579760DED, accessed 12 February 2020, in Danish).