1. Department of SurgeryHenry Ford Hospital Detroit Michigan USA
2. Wolff Center at UPMCUniversity of Pittsburgh Medical Center Pittsburgh Pennsylvania USA
3. Department of SurgeryUniversity of Pittsburgh Pittsburgh, Pennsylvania USA
4. Department of SurgeryVanderbilt University Medical Center Nashville Tennessee USA
5. Division of Vascular Surgery, Stanford University School of Medicine, Stanford, CA, and Surgical Service LineVeterans Affairs Palo Alto Healthcare System Palo Alto California USA
6. Department of OtolaryngologyUniversity of Pittsburgh Pittsburgh Pennsylvania USA
7. Department of UrologyUniversity of Pittsburgh Pittsburgh Pennsylvania USA
8. Center for Health Equity Research and PromotionVeterans Affairs Pittsburgh Healthcare System Pittsburgh Pennsylvania USA
9. Department of Biostatistics, Graduate School of Public HealthUniversity of Pittsburgh Pittsburgh Pennsylvania USA
10. Center for Innovations in Quality, Effectiveness, and Safety, Michael E DeBakey Veterans Affairs Medical Center; Michael E DeBakey Department of SurgeryBaylor College of Medicine Houston Texas USA
11. Department of SurgeryUniversity of Nebraska Medical Center and Nebraska Western Iowa Veterans Affairs Health System Omaha Nebraska USA