Patients were randomly assigned to receive daily subcutaneous injections of replacement-dose C peptide (1.5 mg), high-dose C peptide (4.5 mg), or placebo, for 6 months. At baseline, sensory nerve ...

such as an elevated C-peptide level and a low level of β-hydroxybutyrate, the patient was further investigated for localization of a possible insulinoma. The diagnostic threshold for ...