A. Hokstad, B. Thommessen, H. Ihle-Hansen, B. Indredavik, Øystein Døhl, and T. Askim, “Reduced physical activity level was associated with poorer quality of life during the early phase of the COVID-19 pandemic: a sub-study of the last-long trial”, JRM, vol. 55, p. jrm12352, Dec. 2023.