Changes in physical activity and rest-activity circadian rhythm among Hong Kong community aged population before and during COVID-19.

Author(s)	Lee PM, Huang B, Liao G, Chan CK, Tai LB, Tsang CY, Leung CC, Kwan MP, Tse LA.
Journal / Source	https://bmcpublichealth.biomedcentral.com/articles/10.1186/s12889-021-10890-x
Date	June 2021