Rheumatoid arthritis association with the FCRL3 -169C polymorphism is restricted to PTPN22 1858T-homozygous individuals in a Canadian population. - Newman WG; Zhang Q; Liu X; Walker E; Ternan H; Owen J; Johnson B; Greer W; Mosher DP; Maksymowych WP; Bykerk VP; Keystone EC; et al. (Arthritis & Rheumatism, 2006)