Demographic risk factors for COVID-19 infection, severity, ICU admission and death: a meta-analysis of 59 studies oleh Maurice P Zeegers, Bart G Pijls, Shahab Jolani, Anique Atherley, Raissa T Derckx, Janna I R Dijkstra, Gregor H L Franssen, Stevie Hendriks, Anke Richters, Annemarie Venemans-Jellema, Saurabh Zalpuri