Investigations performed after an overnight fast revealed a morning serum glucose level of 1.9 mmol/L, insulin level of 141 pmol/L (normal range, less than 20.8 pmol/L [3 mU/L] during hypoglycemia), and C-peptide level of 1106 pmol/L (normal reference range, 260–1730 pmol/L). This evidence concerns the gene INS and Hypoglycemia.