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Objective sleep assessment in >80,000 UK mid-life adults: Associations with sociodemographic characteristics, physical activity and caffeine
- Gewei Zhu,
- Michael Catt,
- Sophie Cassidy,
- Mark Birch-Machin,
- Michael Trenell,
- Hugo Hiden,
- Simon Woodman,
- Kirstie N. Anderson
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- Published: December 27, 2019
- https://doi.org/10.1371/journal.pone.0226220