Extracorporeal membrane oxygenation without systemic anticoagulation: a case-series in challenging conditions - Fina, Dario; Matteucci, Matteo; Jiritano, Federica; Meani, Paolo; Kowalewski, Mariusz; Ballotta, Andrea; Ranucci, Marco; Lorusso, Roberto (Journal of Thoracic Disease; Vol 12, No 5 (May 28, 2020): Journal of Thoracic Disease, 2020)