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APA Citation
Ahrens, E., Hemmsen, M. C., Duun-Henriksen, J., Kjær, T. W., Allen, L., Cormack, F., & Taptiklis, N. (n.d.). 0020 Investigation of Seasonal Changes in Self-Reported Sleep Quality and Psychomotor Vigilance Task Outcomes: Results From the Ultra Long-Term Sleep (ULTS) Study. Sleep, 45, A8–A9. http://access.bl.uk/ark:/81055/vdc_100156405824.0x000024