Correction: Estimated Sleep Duration Before and During the COVID-19 Pandemic in Major Metropolitan Areas on Different Continents: Observational Study of Smartphone App Data.

Rebecca Robbins Mahmoud Affouf Matthew D Weaver Mark É Czeisler Laura K Barger Stuart F Quan Charles A Czeisler

Published in: Journal of medical Internet research (2021)

[This corrects the article DOI: 10.2196/20546.].

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