title: The tryptophan depletion challenge test in medical research: unresolved issues and broader implications for the use of physiological challenges to investigate and categorize disease.
authors: Department of Psychiatry, School of Medicine, University of Texas, Health Science Center at San Antonio, San Antonio, Texas 78229-3900, USA. delgadop@uthscsa.edu
authors: Pedro L
authors: PL
authors: Delgado
mesh_terms: D006801:Humans; D012106:Research; D012701:Serotonin / Q000502:physiology*; D014364:Tryptophan / Q000172:deficiency* / Q000502:physiology
chemical_list: D012701:Serotonin; D014364:Tryptophan