NEUROG3 and congenital malabsorptive diarrhea 4: Loss of function mutations in the human NEUROG3 gene causes congenital malabsorptive diarrhea (DIAR4 [MIM: 610370]), a disorder characterized by neonatal diabetes, chronic unremitting malabsorptive diarrhea, vomiting, dehydration, and severe hyperchloremic metabolic acidosis (Wang et al.