1. Digestive Disease Institute, Virginia Mason Medical Center, Seattle, WA, USA
2. Division of Gastroenterology and Hepatology, University of Iowa Hospitals and Clinics, Iowa City, IA, USA
3. Division of Thoracic Surgery, University of Iowa Hospitals and Clinics, Iowa City, IA, USA
4. Division of Bariatric Surgery, University of Iowa Hospitals and Clinics, Iowa City, IA, USA
5. Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, MN, USA
6. Division of Thoracic Surgery, Virginia Mason Medical Center, Seattle, WA, USA