First wave of COVID-19 hospital admissions in Denmark: a Nationwide population-based cohort study oleh Jon Gitz Holler, Robert Eriksson, Tomas Østergaard Jensen, Maarten van Wijhe, Thea Kølsen Fischer, Ole Schmeltz Søgaard, Simone Bastrup Israelsen, Rajesh Mohey, Thilde Fabricius, Frederik Jøhnk, Lothar Wiese, Stine Johnsen, Christian Søborg, Henrik Nielsen, Ole Kirk, Birgitte Lindegaard Madsen, Zitta Barrella Harboe