In the non-lupus group, 16/18 pts were diagnosed primary glomerulonephritis as (1) 13 IgA nephropathies; (2) 1 granulomatosis polyangiitis; (3) 1 crescentic gromerulonephritis; (4) 1 anti-glomerular basement membrane disease; (5) 1 membranoproliferative glomerulonephritis; (6) 1 Focal segmental glomerulosclerosis.