TRPV5 mutation; Klotho deficiency; hereditary dRTA (SLC4A1, ATP6V1B1 or ATP6V0A4, FOXI1, WDR72 and CA2 mutation); Pseudoxanthoma elasticum (PXE, ABCC6 mutation). Here, ATP6V0A4 is linked to pseudoxanthoma elasticum (inherited or acquired).