Predictive ability of viscoelastic testing using ClotPro® for short-term outcome in patients with severe Covid-19 ARDS with or without ECMO therapy: a retrospective study oleh Lars Heubner, Marvin Greiner, Oliver Vicent, Jan Beyer-Westendorf, Oliver Tiebel, Ute Scholz, Andreas Güldner, Martin Mirus, Dietmar Fries, Thea Koch, Peter Markus Spieth