 - International Normalized Ratio INR 1.5 or a prothrombin time PTpartial thromboplastin time PTT within normal limits; patients receiving anticoagulation treatment with an agent such as warfarin or heparin may be allowed to participate; for patients on warfarin, the INR should be measured prior to initiation of sorafenibvorinostat and monitored at least weekly, or as defined by the local standard of care, until INR is stable; vorinostat and sorafenib have both been reported to elevate INR in those on coumadin derivatives 