EF6901B2-23C7-4AC2-9C23-83B0739DEADDEpidemiological and statistical research on health problems of developing countries: MRC Tropical Epidemiology GroupResearch GrantMR/K012126/1C008C651-F5B0-4859-A334-5F574AB6B57CMRCINCOME_ACTUAL39138960E1DF6B7-EA75-4413-AE0F-F5C2F76A410BTrends in silicosis prevalence and the healthy worker effect among gold miners in South Africa: a prevalence study with follow up of employment status.BMC public health6ccdb946021dfcc996e83d7cd7f904f6Knight D2015-01-01http://dx.doi.org/10.1186/s12889-015-2566-826686997http://ukpmc.ac.uk/abstract/MED/266869971471-2458http://europepmc.org/abstract/MED/2668699715Journal Article/Review56debc28628e37.35482407