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Kräuchi K, Cajochen C, Danilenko KV, Wirz-Justice A.Kräuchi K, et al. Among authors: cajochen c.Neurosci Lett. 1997 Aug 22;232(1):57-61. doi: 10.1016/s0304-3940(97)00553-3.Neurosci Lett. 1997.PMID: 9292891Clinical Trial.