Patient selection
fatigue, cardiac or pulmonary condition
SYNDROME, COVID-19 INFECTION
Participants were recruited over 12 months through a post-COVID clinic at the Department of Internal Medicine, University Hospital Leipzig. Patients over the age of 18 with sustained fatigue symptoms (> 50 points with four or more dimensions affected on the MFI-20-questionnaire) at a minimum of 6 weeks after a COVID-19 infection with no known cardiac or pulmonary condition were eligible. The definition of “post-COVID syndrome” was defined in a consensus paper in late 2021 [Consort diagram of the inclusion process in the PCTS study