Using this technique, we found that SERPINC1 and ORM1 increased more in iLN than in SLE, supporting the validity of this platform and in agreement with previous studies identifying urine ORM1 (24, 25) and ceruloplasmin (19, 24, 25) as biomarkers for active LN. The gene discussed is ORM1; the disease is systemic lupus erythematosus.