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

J Med Internet Res. 2021 Feb 22;23(2):e28057. doi: 10.2196/28057.

Abstract

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

Publication types

  • Published Erratum