Published in
Journal of Medical Internet Research, Journal of Medical Internet Research, 2(23), p. e28057, 2021
DOI: 10.2196/28057
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Correction: Estimated Sleep Duration Before and During the COVID-19 Pandemic in Major Metropolitan Areas on Different Continents: Observational Study of Smartphone App Data
Journal article published in 2021 by
Rebecca Robbins 
,
Mahmoud Affouf ,
Matthew D. Weaver ,
Mark É. Czeisler ,
Laura K. Barger ,
Stuart F. Quan ,
Charles A. Czeisler
,
Mahmoud Affouf ,
Matthew D. Weaver ,
Mark É. Czeisler ,
Laura K. Barger ,
Stuart F. Quan ,
Charles A. Czeisler
This paper is made freely available by the publisher.
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