Covid-19 transmission in fitness centers in Norway - a randomized trial.
Lise Mørkved HelsingenMagnus LøbergErle RefsumDagrun Kyte GjøsteinPaulina WieszczyØrjan OlsvikFrederik E JuulIshita BaruaHenriette C JodalMagnhild HerfindalYuichi MoriSolveig JoreFridtjof Lund-JohansenAtle FretheimMichael BretthauerMette Kalagernull nullPublished in: BMC public health (2021)
The trial was prospectively registered in ClinicalTrials.gov on May 13, 2020. Due to administrative issues it was first posted on the register website on May 29, 2020: NCT04406909 .