ELN and pseudoxanthoma elasticum (inherited or acquired): No significant interaction between plasma desmosines and peripheral or total arterial calcification mass was found (p = 0.63 for interaction plasma desmosines and peripheral arterial calcification, p = 0.57 for interaction plasma desmosine and total arterial calcification mass) (Table 3), which shows that both elastin degradation and arterial calcification mass independently contribute to lowering ABI in PXE.