title: Letter: Three periodic diseases as causes of recurrent abdominal pain in childhood.
mesh_terms: D000005:Abdomen; D000799:Angioedema / Q000150:complications; D002648:Child; D030342:Genetic Diseases, Inborn / Q000150:complications; D006801:Humans; D010146:Pain / Q000209:etiology*; D010195:Pancreatitis / Q000150:complications; D010507:Periodicity; D010538:Peritonitis / Q000150:complications