1. Division of Minimally Invasive Surgery, University of Michigan, Ann Arbor, Michigan;
2. Departments of Preventative Medicine, Stony Brook University Medical Center, Stony Brook, New York
3. Bariatric, Foregut, and Advanced Gastrointestinal Surgery Division, Department of Surgery, Stony Brook University Medical Center, Stony Brook, New York;
4. Departments of Applied Mathematics and Statistics, Stony Brook University Medical Center, Stony Brook, New York