1 Department of Gastroenterology and Hepatology, University Medical Center Utrecht, Po Box85500, Utrecht, the Netherlands. Electronic address: k.j.vanerpecum@umcutrecht.nl.
2 Department of Medicine and Research Laboratory of Internal Medicine, Expertise Center of Greece in Autoimmune Liver Diseases, European Reference Network on Hepatological Diseases (ERN RARE-LIVER), General University Hospital of Larissa, Larissa, Greece.