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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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Annual mean the defense meteorological program (DMSP) level in () the Netherlands, () China, and () Saudi Arabia from 1992 to 2013. Data were obtained from https://www.lightpollutionmap.info.

Inline graphic — Annual mean the defense meteorological program (DMSP) level in () the Netherlands, () China, and () Saudi Arabia from 1992 to 2013. Data were obtained from https://www.lightpollutionmap.info.