These results are comparable to a Korean study which found a prevalence of 12.8% in the four relatively common MODY genes (HNF1A, HNF4A, HNF1B, or GCK) among 109 diabetes patients with onset age ≤30 years and a BMI ≤ 30 kg/m2 [36]. This evidence concerns the gene HNF1B and diabetes mellitus.