1. Department of Surgery, University of Washington Medical Center, Seattle
2. Department of Surgery, Madigan Army Medical Center, Ft Lewis, Washington
3. Department of Surgery, Swedish Medical Center, Seattle, Washington
4. Department of General and Vascular Surgery, Providence Medical Center, Everett, Washington
5. Department of Surgery, Virginia Mason Medical Center, Seattle, Washington
6. Department of Surgery, St Joseph Medical Center, Bellingham, Washington
7. Department of Surgery, Harborview Medical Center, Seattle, Washington