RT Journal Article SR Electronic T1 Exercise capacity impairment after COVID-19 pneumonia is mainly caused by deconditioning JF European Respiratory Journal JO Eur Respir J FD European Respiratory Society SP 2101136 DO 10.1183/13993003.01136-2021 VO 59 IS 1 A1 Kathleen Jahn A1 Mihaela Sava A1 Gregor Sommer A1 Desiree M. Schumann A1 Stefano Bassetti A1 Martin Siegemund A1 Manuel Battegay A1 Daiana Stolz A1 Michael Tamm A1 Nina Khanna A1 Katrin E. Hostettler YR 2022 UL http://erj.ersjournals.com/content/59/1/2101136.abstract AB