However, hypoparathyroidism has not been reported in other patients with the most common mitochondrial β-oxidation defects, such as carnitine palmitoyl transferase II (CPTII) deficiency and very-long-chain acyl-CoA dehydrogenase deficiency (VLCADD) (34). Here, CPT2 is linked to very long chain acyl-CoA dehydrogenase deficiency.