Upper endoscopy, Bravo capsule pH test, Impedance pH testing, Colonoscopy, Esophageal manometry, Gastrointestinal trans...it study, Gastric emptying study, Breath testing, Anorectal manometry, Irritable bowel syndrome, Nonulcer stomach pain, Constipation, Diarrhea, Gastroparesis, Functional bowel disorder, Heartburn