1. Rheumatoid arthritis-nature or nurture?;S, Lawrence J.;Ann Rheum Dis,1970
2. The familial aggregation of rheumatoid arthritis and its relationship to the HLA DR4 association;J, Deljunco D.; S, Luthra H.; F, Annegers J.; W, Worthington J.; T, Kurland L.;AmJ Epidemiol,1984
3. Occurrence of rheumatoid arthritis in a nationwide series of twins;Aho, K.; Markku, K.; Tuominen, J.; Kaprio, J.;J Rheumatol,1986
4. Empire Rheumatism Council report on an enquiry into the aetiological factors associated with rheumatoid arthritis;Lewis-Faning, E.;Ann Rheum Dis,1950
5. Familial incidence of rheumatoid arthritis and acute rheumatism in 100 rheumatoid arthritics;W, Barter R.;Ann Rheum Dis,1952