title: [L-tryptophan treatment in essential headache: preliminary data].
mesh_terms: D000293:Adolescent; D000328:Adult; D002986:Clinical Trials as Topic; D004311:Double-Blind Method; D004341:Drug Evaluation; D005260:Female; D006261:Headache / Q000188:drug therapy*; D006801:Humans; D008297:Male; D008875:Middle Aged; D008881:Migraine Disorders / Q000188:drug therapy; D010919:Placebos; D014364:Tryptophan / Q000008:administration & dosage / Q000627:therapeutic use*
chemical_list: D010919:Placebos; D014364:Tryptophan
vernacular_title: Trattamento con L-triptofano nelle cefalee essenziali: dati preliminari.