SLC25A13 and citrin deficiency: Clinically, citrin deficiency has 3 age-dependent phenotypes: neonatal intrahepatic cholestasis caused by citrin deficiency (NICCD, Online Mendelian Inheritance in Man #605814), adaptation/compensation stage with unique food preference during childhood, and adult-onset type 2 citrullinemia (CTLN2, Online Mendelian Inheritance in Man #603471).