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Ethnicity, sleep, mood, and illumination in postmenopausal women

Daniel F Kripke*, Girardin Jean-Louis, Jeffrey A Elliott, Melville R Klauber, Katharine M Rex, Arja Tuunainen and Robert D Langer

BMC Psychiatry 2004, 4:8  doi:10.1186/1471-244X-4-8

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