Letter to the Editor

References 

1. Goddard AW, Charney DS, Germine M, Woods SW, Heninger GR, Krystal JH, et al. Effects of tryptophan depletion on responses to yohimbine in healthy human subjects. Biological Psychiatry. 1995;38:74–85
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2. Kent JM, Coplan JD, Martinez J, Karmally W, Papp LA, Gorman JM. Ventilatory effects of tryptophan depletion in panic disorder: a preliminary report. Psychiatry Research. 1996;64:83–90
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3. Klaassen T, Klumperbeek J, Deutz NE, van Praag HM, Griez EG. Effects of tryptophan depletion on anxiety and on panic provoked by carbon dioxide challenge. Psychiatry research. 1998;77:167–174
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4. Miller HE, Deakin JF, Anderson IM. Effects of acute tryptophan depletion on CO₂ induced anxiety in patients with panic disorder and normal volunteers. The British Journal of Psychiatry. 2000;176:182–188
5. Schruers K, Klaassen T, Pols H, Overbeek T, Deutz NE, Griez E. Effects of tryptophan depletion on carbon dioxide provoked panic in panic disorder patients. Psychiatry Research. 2000;93:179–187
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