title: Letter: Factors influencing effect of hydrocortisone on rat brain tryptophan metabolism.
mesh_terms: D000367:Age Factors; D000818:Animals; D001921:Brain / Q000187:drug effects / Q000378:metabolism*; D001923:Brain Chemistry / Q000187:drug effects; D004304:Dosage Forms; D006854:Hydrocortisone / Q000008:administration & dosage / Q000494:pharmacology*; D051381:Rats; D012107:Research Design; D012701:Serotonin / Q000378:metabolism; D014364:Tryptophan / Q000032:analysis / Q000378:metabolism*
chemical_list: D004304:Dosage Forms; D012701:Serotonin; D014364:Tryptophan; D006854:Hydrocortisone