Subsequently, CD was found to be associated with intrahepatic cholestasis in neonates or infants [3]–[5], and these findings led to the introduction of a new nomenclature of Neonatal Intrahepatic Cholestasis caused by Citrin Deficiency (NICCD, OMIM #605814) [6]–[8]. The gene discussed is SLC25A13; the disease is intrahepatic cholestasis.