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. 2024 Jul 19;30(9):2648–2656. doi: 10.1038/s41591-024-03155-8

Fig. 1. Heatmap of sleep onset time and total sleep duration for all person-nights.

Fig. 1

Heatmap of sleep duration is plotted versus sleep onset time across all person-nights. All sleep periods were flagged as ‘main sleep’ by Fitbit devices.