DRB1*15 allele is a risk factor for PR3-ANCA disease in African Americans.
Cao Y, Schmitz JL, Yang J, Hogan SL, Bunch D, Hu Y, Jennette CE, Berg EA, Arnett FC, Jennette JC, Falk RJ, Preston GA. DRB1*15 allele is a risk factor for PR3-ANCA disease in African Americans. J Am Soc Nephrol. 2011 Jun; 22(6):1161-7.