28/341 patients on warfarin who were admitted for hemorrhage, had significantly lower CAT-TG levels (ETP 333 ± 89 nM/min) than 300/341 control patients on warfarin who were admitted for any other medical condition (ETP 436 ± 207 nM/min)(p < 0.001), despite similar INR values (2–3). The gene discussed is CAT; the disease is hemorrhage.