Although all individuals suffering from favism appear to show G6PD-deficiency, not all G6PD-deficient individuals suffer from favism; this has led to speculation that other inherited factor(s) in addition to G6PD genotype differences present within broadly defined phenotypic classes may be important in determining the pathological problems associated with this enzymopathy [14, 15]. Here, G6PD is linked to hyperinsulinemic hypoglycemia, familial, 4.