First Clinical Application of the Medos HIA Ventricular Support System: Monitoring of the Thrombotic Risk by Means of the Biomarker Prothrombin Fragment F1 + F2 and Scanning Electron Microscopy Evaluation . - Guldner,N.W.; Siemens,H-J.; Schramm,U. (J Heart and Lung Transpl, 1996)