Division of Gastroenterology and Hepatology;
Department of Medicine;
William Beaumont Hospital;
Oakland University William Beaumont School of Medicine;
Morbid obesity; Bariatric surgery; Roux-en-Y gastric bypass surgery; Upper gastrointestinal bleeding; Esophagogastroduodenoscopy; Push enteroscopy; Single balloon enteroscopy; Therapeutic endoscopy; Double balloon enteroscopy;