Using the common blood thinning drug warfarin to prevent blood clots and heart attacks in people who have recently suffered some sort of traumatic injury can be deadly, a new study has found.Researchers from Vanderbilt University Medical Center studied more than one million trauma patients who were treated with warfarin at the time of their injuries. They found such patients were more likely to die compared to trauma patients who were not taking the drug at the time of their traumatic injury, ac