ALB and pulmonary fibrosis: After 6 months of induction therapy, the radiological signs of pulmonary fibrosis were evident in 1 responder and 4 non-responders (p = 0.011), but urine protein to creatinine, albumin to creatinine, IgG to creatinine, IgG to albumin, NAG to creatinine and α-1-microglobulin to creatinine ratios had no predictive values for pulmonary response.