Roiser, J P; Levy, J; Fromm, S J; Nugent, A C; Talagala, S L; Hasler, G; Henn, F A; Sahakian, B J; Drevets, W C (2009). The effects of tryptophan depletion on neural responses to emotional words in remitted depression. Biological Psychiatry, 66(5):441-450.
Roiser, J P; Levy, J; Fromm, S J; Wang, H; Hasler, G; Sahakian, B J; Drevets, W C (2008). The effect of acute tryptophan depletion on the neural correlates of emotional processing in healthy volunteers. Neuropsychopharmacology, 33(8):1992-2006.