FCGR3A and systemic lupus erythematosus: In this study, we have determined for the first time, the frequencies of FcγRIIa-H131R, FcγRIIb-I232T, FcγRIIIa-F158V, and FcγRIIIb-NA1/NA2 polymorphisms and their association with SLE and LN in 126 patients with SLE including 58 patients with LN and 120 unrelated controls from this indigenous African Caribbean population.