[1] Univ Cape Town, Sch Publ Hlth & Family Med, Ctr Infect Dis Epidemiol & Res, ZA-7700 Rondebosch, South Africa
[2] UCT Lung Inst, Knowledge Translat Unit, Cape Town, South Africa
[3] Univ Toronto, Toronto, ON M5S 1A1, Canada
[4] Univ E Anglia, Sch Med Hlth Policy & Practice, Norwich NR4 7TJ, Norfolk, England