title: Many causes are unknown.
authors.forename: Christoph
authors.initials: C
authors.lastname: Namislo
mesh_terms: D015746:Abdominal Pain / Q000175:diagnosis* / Q000209:etiology / Q000628:therapy*; D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D015928:Cognitive Behavioral Therapy / Q000379:methods*; D004035:Diet Therapy / Q000379:methods*; D005260:Female; D005767:Gastrointestinal Diseases / Q000150:complications / Q000175:diagnosis* / Q000628:therapy*; D006801:Humans; D007231:Infant, Newborn; D008297:Male; D055502:Secondary Prevention