title: Irritable bowel syndrome.
mesh_terms: D000328:Adult; D001007:Anxiety; D003109:Colonic Diseases, Functional / Q000175:diagnosis; D003967:Diarrhea / Q000209:etiology; D005260:Female; D006801:Humans; D007787:Lactose Intolerance / Q000209:etiology; D008297:Male; D008875:Middle Aged; D010146:Pain; D011446:Prospective Studies; D012744:Sex Ratio; D013188:Sri Lanka