CPT2 and hyperinsulinemic hypoglycemia, familial, 4: A case report published in 2017 concerned a 4-year-old girl presenting with rhabdomyolysis, in whom CPT II deficiency had been missed in NBS, which suggested that the ratio of several long-chain acylcarnitines to propionylcarnitine (C3) in dried blood specimens (DBSs) from newborns, such as (C16 + C18:1)/C3, C18/C3, C16/C3, C16-OH/C3, and C14/C3, can serve as better indices in CPT II deficiency screening [5].