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Buysse DJ, Hall M, Begley A, Cherry CR, Houck PR, Land S, Ombao H, Kupfer DJ, Frank E.Buysse DJ, et al. Among authors: kupfer dj.Psychiatry Res. 2001 Aug 5;103(1):51-67. doi: 10.1016/s0165-1781(01)00270-0.Psychiatry Res. 2001.PMID: 11472790Clinical Trial.