. 2019 May 11;21(6):e13482. doi: 10.2196/13482
©Zhongxing Zhang, Christian Cajochen, Ramin Khatami. Originally published in the Journal of Medical Internet Research (http://www.jmir.org), 11.05.2019.
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Figure 6.
Histogram of social jetlag of (a) all subjects, (b) people with zero naps, and (c) people with long naps. h: hours.