INS and Schnyder corneal dystrophy: Basal plasma insulin lispro concentrations were similar between interventions (RCD: 56 pmol/l [IQR 40–74], SCD: 63 pmol/l [IQR 43–83], Fig. 4A) and increased approximately fivefold during the hyperinsulinemic-euglycemic clamp (Fig. 4B).