Hofman Karen J, McGee Shelley, Chalkidou Kalipso, Tantivess Sripen, Culyer Anthony J
PRICELESS SA and Medical Research Council/University of the Witwatersrand Rural Public Health and Health Transitions Research Unit (Agincourt), School of Public Health, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa.
S Afr Med J. 2015 Sep 14;105(9):739-40. doi: 10.7196/SAMJnew.8584.