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van Dyck CH, Lin CH, Robinson R, Cellar J, Smith EO, Nelson JC, Arnsten AF, Hoffer PB.van Dyck CH, et al. Among authors: hoffer pb.Psychopharmacology (Berl). 1997 Aug;132(3):217-26. doi: 10.1007/s002130050339.Psychopharmacology (Berl). 1997.PMID: 9292621Clinical Trial.