1. Muller AS, Valkenburg HA, Greenwood BM (1972) Rheumatoid arthritis in three West African populations. East Afr Med J 49:75?83
2. Lawrence JS (1975) Rheumatism in populations. Heinemann, London
3. Adebajo AO, Davis P (1992) Rheumatology on the Dark Continent: not as dark as it was. J Rheumatol 19:195?197
4. Greenwood BM (1969) Polyarthritis in Western Nigeria. I. rheumatoid arthritis. Ann Rheum Dis 28:488?496
5. Adebajo AO, Reid DM (1991) The pattern of rheumatoid arthritis in West Africa and comparison with a cohort of British patients. Q J Med 80:633?640