We conducted a multicentre analysis encompassing four Brazilian admixed populations from different regions of Brazil. A total of 740 patients with RA, diagnosed according to the ACR, and 676 controls from the cities of Porto Alegre (South), Bele´m (North), Recife (Northeast) and Ribeira˜ o Preto (Southeast) were PCR genotyped for the CCR5Delta32 polymorphism
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