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

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The sleepiness level reported (A) before work, (B) during work, and (C) after work during a rotating shift schedule across 5-time points within the schedule starting from (1) pre-shift, (2) day shift one, (3) night shift one, (4) day off one, and (5) day off two. Note, *(A) day off one significantly higher than day off two (p < 0.05), (B) night shift one and day off one significantly higher than pre shift (p < 0.05), and (C) night shift one and day off one significantly higher than pre-shift and day off two (p < 0.05).