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. 2021 Aug 12;16(8):e0256063. doi: 10.1371/journal.pone.0256063

Fig 1. Daily average sleep opportunity onset time and sleep opportunity offset time in 2020 presented by age cohort.

Fig 1

Each age cohort is plotted in a different color, indicted in the legend. Filled circles indicate Sundays; a gray vertical line separates baseline and physical distancing.