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Efficacy and hypnotic effects of melatonin in shift-work nurses: double-blind, placebo-controlled crossover trial

Khosro Sadeghniiat-Haghighi*, Omid Aminian, Gholamreza Pouryaghoub and Zohreh Yazdi

Journal of Circadian Rhythms 2008, 6:10 doi:10.1186/1740-3391-6-10

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