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. 2023 May 10;18:755–769. doi: 10.2147/CIA.S398957

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© 2023 Otsuka et al.

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Relation between circadian-circasemidian coupling of SBP and morning SBP surge (left), or evening SBP surge (right). Left: Shorter circadian-circasemidian couplings of SBP are associated with larger morning SBP surges. Right: Longer circadian-circasemidian couplings of SBP are associated with larger evening SBP surges.