 - Patients may not require regular use of aspirin daily for 10 days at doses of 325 mgday or regular therapeutic doses of other nonsteroidal anti-inflammatory agents known to inhibit platelet function; additionally, patients using any of the following drugs known to inhibit platelet function are not eligible: dipyridamole Persantine, ticlopidine Ticlid, clopidogrel Plavix and cilostazol Pletal; NOTE: regular use of Cox-2 inhibitors is permitted; NOTE: low-dose aspirin is permitted 