Porter, Richard J Effects of rapid tryptophan depletion on salivary cortisol in older people recovered from depression, and the healthy elderly. [electronic resource] - Journal of psychopharmacology (Oxford, England) Jan 2007 - 71-5 p. digital Publication Type: Journal Article; Randomized Controlled Trial; Research Support, Non-U.S. Gov't ISSN: 0269-8811 Standard No.: 10.1177/0269881106064341 doi Subjects--Topical Terms: AgedAnalysis of VarianceAntidepressive Agents--therapeutic useConvalescenceCross-Over StudiesDepressive Disorder, Major--bloodDouble-Blind MethodFemaleHumansHydrocortisone--metabolismHypothalamo-Hypophyseal System--metabolismMalePituitary-Adrenal System--metabolismReference ValuesSaliva--metabolismSerotonin--metabolismTime FactorsTryptophan--blood