Warfarin or Low-Molecular-Weight Heparin Therapy does not Prolong Pig-To-Primate Cardiac Xenograft FunctionGuerard W. Byrne; Johannes M. Schirmer; David N. Fass; Sumeet S. Teotia; Walter K. Kremers; Hui Xu; Bashoo Naziruddin; Henry D. Tazelaar; John S. Logan; Christopher G. A. McGregor · 2005