1. Department of Surgery, Baylor University Medical Center, Dallas, Texas, USA
2. Texas A&M School of Medicine, Baylor University Medical Center, Dallas, Texas, USA
3. Division of Colon & Rectal Surgery, David Geffen School of Medicine at UCLA, Harbor-UCLA Medical Center, Los Angeles, California, USA
4. Division of Colon and Rectal Surgery, Department of Surgery, Baylor University Medical Center, Dallas, Texas, USA