Cited 243 times since 2020 (63.8 per year) source: EuropePMC The European respiratory journal, Volume 56, Issue 1, 2 1 2020, Pages 2001494 The Post-COVID-19 Functional Status scale: a tool to measure functional status over time after COVID-19. Klok FA, Boon GJAM, Barco S, Endres M, Geelhoed JJM, Knauss S, Rezek SA, Spruit MA, Vehreschild J, Siegerink B