HAS2 and focal segmental glomerulosclerosis: Since large-scale whole-exome sequencing studies did not identify any ZXH2-related disease-causing variants (37, 38), the genomes of 36 patients with glomerular disease (9 MCD, 19 FSGS, 8 COVID-19–related FSGS collapsing variant) and 33 controls (Supplemental Table 1) were sequenced from the beginning of hyaluronan synthase 2 (HAS2; the immediate upstream gene) (Figure 6A) to the end of ZHX2.