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. 2021 Jan 13;11:866. doi: 10.1038/s41598-020-79093-5

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The study procedure and duration throughout a rotating shift schedule. S (Pittsburgh Sleep Diary), Q (Work diary; Samn–Perelli Fatigue Checklist, Karolinska Sleepiness Scale, and self-reported stress rating), orange bars (scheduled work time), and grey bars (sleep opportunity).