PT - JOURNAL ARTICLE AU - Burtscher, Johannes AU - Millet, Grégoire P AU - Burtscher, Martin TI - Low cardiorespiratory and mitochondrial fitness as risk factors in viral infections: implications for COVID-19 AID - 10.1136/bjsports-2020-103572 DP - 2021 Apr 01 TA - British Journal of Sports Medicine PG - 413--415 VI - 55 IP - 8 4099 - http://bjsm.bmj.com/content/55/8/413.short 4100 - http://bjsm.bmj.com/content/55/8/413.full SO - Br J Sports Med2021 Apr 01; 55