ALB and nephrotic syndrome: At the diagnosis of pMN, all of them showed nephrotic syndrome, with a high level of urinary protein 6.5(3.9, 12.0) g/24h and a low level of serum albumin 22.0(16.0, 29.0) g/L, as well as almost normal kidney function, with serum creatinine of 73.0(60.0, 84.0) μmol/L and eGFR of 92.9(81.3, 107.2) mL/min/1.73m2, respectively (Supplementary Table S1).