Corrigendum to: community-based health workers implementing universal access to HIV testing and treatment: lessons from South Africa and Zambia—HPTN 071 (PopART). Issue 7 (29th June 2021) - Viljoen, Lario; Mainga, Tila; Casper, Rozanne; Mubekapi-Musadaidzwa, Constance; Wademan, Dillon T; Bond, Virginia A; Pliakas, Triantafyllos; Bwalya, Chiti; Stangl, Anne; Phiri, Mwelwa; Yang, Blia; Shanaube, Kwame; et al.