1. University Healthcare Thrombosis Service, University of Utah Health Sciences Center, Salt Lake City, UT, USA
2. Division of General Internal Medicine, Department of Internal Medicine, Salt Lake City, UT, USA
3. Molecular Medicine Program, University of Utah School of Medicine, Salt Lake City, UT, USA
4. Department of Internal Medicine, George E. Wahlen Salt Lake City VAMC, Salt Lake City, UT, USA