The threshold values for peak GH after provocative testing have varied between institution and studies, with some reporting partial GHD if peak is between 7-10 ng/mL and severe deficiency if stimulated peak is < 7 ng/mL (18), while others have used a cut off of GH sufficiency if levels are > 15 mU/L (5.775 ng/mL) (29) making comparison between studies difficult. The gene discussed is GH1; the disease is hyperinsulinemic hypoglycemia, familial, 4.