High variability was again observed in the ES‐ADPKD group, with 6, 5, 6, and 10 samples, respectively, falling below the limit of quantification for EPHX2, TPMT, AO, and SULT1C2 (ES‐ADPKD: n = 14). The gene discussed is SULT1C2; the disease is autosomal dominant polycystic kidney disease.