- The participant has adequate coagulation function (an international normalized ratio [INR] ≤ 1.5 and a Partial Thromboplastin Time [PTT] ≤ 5 seconds above the ULN [unless on oral anticoagulant therapy]). Participants receiving full-dose anticoagulation therapy are eligible provided they meet all other criteria, are on a stable dose of oral anticoagulant or low molecular weight heparin (and if on warfarin have a therapeutic INR between 2 and 3)