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Globally altered sleep patterns and physical activity level..:

Khaled Trabelsi ; Achraf Ammar ; Liwa Masmoudi...
https://www.termedia.pl/Globally-altered-sleep-patterns-and-physical-activity-levels-by-confinement-in-5056-individuals-ECLB-COVID-19-international-online-survey,78,42644,1,1.html.  , 2020