^ANCA-positive crescentic IgAN versus ANCA-negative crescentic IgAN; ^c^ANCA-positive crescentic IgAN versus ANCA-associated crescentic glomerulonephritis.  [^0]: ANCA, antineutrophil cytoplasmic autoantibody p, p-ANCA, MPO-ANCA; c, c-ANCA, PR0-ANCA; p + c, p-ANCA + c-ANCA, MPO-ANCA + PR0-ANCA; IgAN, IgA nephropathy; BVAS, 