This is a multicenter, open-label study of maralixibat in subjects diagnosed with cholestatic liver disease (including, but not limited to ALGS, PFIC or Biliary Atresia) who have previously participated in a maralixibat clinical study. All subjects will receive maralixibat in this study.
Evaluate the long-term safety of maralixibat (MRX) in subjects with cholestatic liver disease including, but not limited to, Alagille Syndrome (ALGS), Progressive Familial Intrahepatic Cholestasis (PFIC) and Biliary Atresia.