[1] Baylor Coll Med, Div Vasc Surg & Endovasc Therapy, Michael E DeBakey Dept Surg, Houston, TX 77030 USA
[2] Michael E DeBakey Vet Affairs Ctr, Houston, TX USA
[3] West Virginia Univ, Div Vasc Surg & Endovasc Therapy, Dept Cardiovasc & Thorac Surg, Sch Med, Morgantown, WV 26506 USA
[4] West Virginia Univ, Sch Publ Hlth, Dept Occupat & Environm Hlth Sci, Morgantown, WV 26506 USA