Attrition when providing antiretroviral treatment at CD4 counts >500cells/mu L at three government clinics included in the HPTN 071 (PopART) trial in South Africa - Bock, P; Fatti, G; Ford, N; Jennings, K; Kruger, J; Gunst, C; Louis, F; Grobbelaar, N; Shanaube, K; Floyd, S; Grimwood, A; Hayes, R; et al. (PLoS ONE, 2018)