1. Department of GI, Trauma and Endocrine Surgery, The University of Colorado Anschutz Medical Campus, Aurora, CO, USA
2. Department of Surgery, Rocky Mountain Regional VA Medical Center, Aurora, CO, USA
3. Department of Gynecology, St. Joseph Hospital, Denver, CO, USA
4. Division of Gastroenterology, Department of Medicine, The University of Colorado Anschutz Medical Campus, Aurora, CO, USA
5. Department of Gastroenterology, Rocky Mountain Regional VA Medical Center, Aurora, CO, USA