[1] Stellenbosch Univ, Div Epidemiol & Biostat, Fac Med & Hlth Sci, Francie van Zijl Dr, ZA-7505 Cape Town, South Africa
[2] Univ Witwatersrand, Sch Publ Hlth, Fac Hlth Sci, Johannesburg, South Africa
[3] Pakachere Inst Hlth & Dev Commun, Blantyre, Malawi
[4] Univ Canberra, Dept Med Radiat Sci, Canberra, WA, Australia
[5] Dept Environm Hlth, Dist TB Off, Dist Hlth Off, Ntcheu, Malawi
[6] Univ Witwatersrand, Div Community Paediat, Fac Hlth Sci, Johannesburg, South Africa
[7] Minist Hlth, Community Hlth Sci Unit, Natl TB Control Program, Lilongwe, Malawi
[8] Res Equ & Community Hlth REACH Trust, Lilongwe, Malawi
[9] Univ Malawi, Dept Community Hlth, Coll Med, Blantyre, Malawi
[10] Univ Malawi, Coll Med, African Ctr Excellence Publ Hlth & Herbal Med, Blantyre, Malawi
[11] Univ Malawi, Ctr Social Res, Zomba, Malawi