Rapid establishment of a national surveillance of COVID-19 hospitalizations in Belgium, Van Goethem, Nina, Vilain Aline, Wyndham-Thomas Chloé, Deblonde Jessika, Bossuyt Nathalie, Lernout Tinne, Rebolledo Javiera, Quoilin Sophie, Melis Vincent, and Van Beckhoven Dominique , Archives of Public Health, Jan-12-2020, Volume 78, Issue 1, (2020)