The distribution of FCGR polymorphisms has been reported to exhibit substantial inter-ethnic variation. According to our population, frequencies of FCGR2A 131R/R, FCGR3B NA2/ NA2, and FCGR2B 232T/T in all subjects were 16%, 11%, and 7% respectively, similar to those reported among other Asian populations (which ranged 9-14%, 11-21%, and 5-11%) [19] [20] [21] [22] [23] [24] [25] [26] . Frequencies of these genotypes in Caucasian population were reported to be 19-34%, 38-43%, and 1-3% [18, 23, [27] [28] [29] [30] , which were different from our data. There seems no marked difference in the distribution of FCGR3A 158F/V genotypes between the Asian and Caucasian populations [18, 21, 23, 31, 32] .