title: Letter: Reappearance of intestinal gas cysts after oxygen treatment.
mesh_terms: D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010102:Oxygen Inhalation Therapy; D011006:Pneumatosis Cystoides Intestinalis / Q000150:complications* / Q000628:therapy; D012008:Recurrence