Evbuomwan O, Endres W, Tebieia T, Engelbrecht G. Incidence and follow-up of persistent lung perfusion abnormalities as a result of suspected air trapping or microthrombosis in non-hospitalised COVID-19 patients during the early half of the pandemic – experience in a tertiary institution in South Afr. S Afr Med J. 2022;112(11):850-854. doi:10.7196/SAMJ.2022.v112i11.16578