1. Department of SurgeryUniversity of PittsburghPittsburghPennsylvaniaUSA
2. Veterans Affairs Pittsburgh Healthcare SystemPittsburghPennsylvaniaUSA
3. Department of PharmacologyUniversity of PittsburghPittsburghPennsylvaniaUSA
4. Vascular Medicine InstituteUniversity of PittsburghPittsburghPennsylvaniaUSA