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. 2021 Apr 30;12:664610. doi: 10.3389/fneur.2021.664610

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Copyright © 2021 Wu, Bai, Wang, Zhang, Liu, Chen, Li and Zhang.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Melatonin and cortisol levels at five timepoints within a 24 h period. (A,B) differences in the levels of melatonin and cortisol between the night shift and day work nurses at 2:00, 6:00, 10:00, 16:00, and 22:00 (UTC + 8), respectively.