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. 2020 Sep 10;11:622. doi: 10.3389/fendo.2020.00622

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Copyright © 2020 Khan, Yumnamcha, Mondal, Devi, Rajiv, Labala, Sanjita Devi and Chattoraj.

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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Image showing the change in the level of artificial light at night (ALAN) in Wuhan from 2012 to 2019. Data were obtained from https://www.lightpollutionmap.info.