A novel R432T mutation in the bile salt export pump gene (BSEP; ABCB11) is associated with recurrent intrahepatic cholestasis in an adolescent patient: Gerd A Kullak-Ublick, Divisions of Clinical Pharmacology/Toxicology and Gastroenterology/Hepatology, Department of Internal Medicine, University Hospital Zurich, Zurich Switzerland; Reinhold Kerb, Epidauros Biotechnologie AG, Bernried Germany; Beat Mullhaupt, Eberhard L Renner, Division of Gastroenterology/Hepatology, Department of Internal Medicine, University Hospital Zurich, Zurich Switzerland; Anja Penger, Ulrich Brinkmann, Epidauros Biotechnologie AG, Bernried Germany; Bruno Stieger, Peter J Meier, Division of Clinical Pharmacology/Toxicology, Department of Internal Medicine, University Hospital Zurich, Zurich Switzerland