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Buysse DJ, Hall M, Tu XM, Land S, Houck PR, Cherry CR, Kupfer DJ, Frank E.Buysse DJ, et al.Psychiatry Res. 1998 Jun 15;79(2):105-22. doi: 10.1016/s0165-1781(98)00028-6.Psychiatry Res. 1998.PMID: 9705049