Rheumatic disorders in the South African Negro. Part I. Rheumatoid arthritis and ankylosing spondylitis.


Epidemiological studies to determine the prevalence of rheumatoid arthritis (RA) have been carried out in two South African Negro populations: one rural people in the north-western Transvaal, and the other an urban community in Johannesburg. Altogether 1352 subjects over the age of 15 years were examined clinically and radiologically; serological tests for… (More)


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