MTHFR and hyperinsulinemic hypoglycemia, familial, 4: 1. Prothrombin G20210A mutation (9–21%)2. Factor V Leiden mutation (9–13%)3. MTHFR mutation (4.5%)4. Antithrombin deficiency (3%)5. Protein C deficiency (2–5%)6. Protein S deficiency (2–3%)