title: Gastroscopic features of children with chronic abdominal pain.
mesh_terms: D000005:Abdomen; D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D002908:Chronic Disease; D005260:Female; D005773:Gastroscopy; D006801:Humans; D008297:Male; D010146:Pain / Q000209:etiology*