WT1 and nephrotic syndrome: The commonest genes associated with nephrotic syndrome differ at birth (NPHS1, NPHS2, WT1, LAMB2, PAX2, PLCE1), in childhood or adolescence (NPHS1, NPHS2, WT1, LAMB2, SMARCAL1, NUP107, TRPC6, PLCE1) and in adults (COL4A3-COL4A5, GLA, ACTN4, CD2AP, INF2, TRPC6).