ASAS-PerSpA worldwide study: axSpA most common SpA from in family hx. Except in Middle Eastern/N. African pts, a FH of axSpA associated w/ +HLA-B27 in axSpA pts. PsO and IBD FH more likely -HLA-B27 . FH of ReA rare. Abs 0368 #ACR21 #RheumNow @RheumNow https://t.co/iHBccAcvLi https://t.co/FCoyVg3MGw