Functional gastrointestinal disorders related to psychological factors: i. Functional esophageal disorders 1, hysteria 2, functional chest pain 3, functional heartburn 4, dysfunctional dysphagia ii. Functional gastrointestinal disorders 1, functional dyspepsia 2, gas-swallowing disorder 3, functional vomiting 4, regurgitation syndrome iii. Functional intestinal disorders and abdominal pain 1, irritable bowel syndrome 2, functional bloating 3, functional diarrhea iv. Functional abdominal pain V. Functional disorders of the biliary tract and pancreas 1. Abnormal gallbladder contraction 2. Abnormal sphincter function VI. Anal and rectal disorders 1. Functional fecal incontinence 2. Functional rectal pain 3. Defecation disorders