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A. Quera Salva, M., Hartley, S., Barbot, F., C. Alvarez, J., Lofaso, F., & Guilleminault, C. (2011). Circadian Rhythms, Melatonin and Depression. Current Pharmaceutical Design, 17(15), 1459–1470. doi:10.2174/138161211796197188 
10.2174/138161211796197188