1. University of Michigan Medical School 1301 Catherine Street, 3960 Preserve Drive 48130 Dexter, Ann Arbor MI USA
2. Department of Surgery Center for Surgical Training and Research University of Michigan Michigan Medicine 1500 E. Medical Center Drive Ann Arbor MI USA
3. Department of General Surgery and Endoscopy Tenwek Hospital 39 Bomet Bomet Kenya
4. Department of Surgery University of Michigan Michigan Medicine 1500 E. Medical Center Drive Ann Arbor MI USA