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APA Citation
Youngstedt, S. D., Goff, E. E., Reynolds, A. M., Kripke, D. F., Irwin, M. R., Bootzin, R. R., Khan, N., & Jean-Louis, G. (2016). has adult sleep duration declined over the last 50+ years?. Sleep medicine reviews, 28, 69–85. http://access.bl.uk/ark:/81055/vdc_100033034431.0x000024