Economic barriers to diagnostic equity: A multi-country analysis of patient costs for rapid SARS-CoV-2 testing in sub-Saharan Africa - Obinna Ekwunife; Collin Mangenah; Lucky Ngwira; Elizabeth Corbett; Karin Hatzold; Elvis Isere; John Bimba; Euphemia Sibanda; Frances M. Cowan; Godpower Omoregie; Gabrielle Bonnet (PLoS ONE, 2026)