SLC6A8 and hyperinsulinemic hypoglycemia, familial, 4: The global prevalence of PCD in the screened population was 0.25% (16/6,353; CI95: 0.13% - 0.38%), the prevalence of GAMT deficiency was 0.09% (6/6,353; CI95: 0.02% - 0.17%) and the prevalence of SLC6A8 deficiency was 0.16% (12/6,353; CI95: 0.06% - 0.26%).