title: Tympanomastoidectomy and oral zinc.
mesh_terms: D000293:Adolescent; D002648:Child; D004311:Double-Blind Method; D006801:Humans; D008416:Mastoid / Q000601:surgery*; D014945:Wound Healing / Q000187:drug effects*; D015032:Zinc / Q000627:therapeutic use*
chemical_list: D015032:Zinc