Hypercoagulability in critically ill patients with COVID 19, an observational prospective study. - Calvet, Laure; Thouy, François; Mascle, Olivier; Sapin, Anne-Françoise; Grapin, Kévin; Liteaudon, Jean Mathias; Evrard, Bertrand; Bonnet, Benjamin; Adda, Mireille; Souweine, Bertrand; Dupuis, Claire (PLoS ONE, 2022)