“This is an illness. No one is supposed to be treated badly”: community-based stigma assessments in South Africa to inform tuberculosis stigma intervention design by Foster, I, Biewer, A, Vanqa, N, Makanda, G, Tisile, P, Hayward, SE, Wademan, DT, Anthony, MG, Mbuyamba, R, Galloway, M, Human, W, van der Westhuizen, H, Friedland, JS, Medina-Marino, A, Schoeman, I, Hoddinott, G, Nathavitharana, RR