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Helms CM, Reeves JM, Mitchell SH.Helms CM, et al. Among authors: mitchell sh.Psychopharmacology (Berl). 2006 Oct;188(2):144-51. doi: 10.1007/s00213-006-0478-0. Epub 2006 Aug 17.Psychopharmacology (Berl). 2006.PMID: 16915383