1 Coordinating Center for Alpha-1 Antitrypsin Deficiency-related Liver Disease of the European Reference Network on Hepatological Diseases (ERN RARE-LIVER) and the European Association for the Study of the Liver (EASL) Registry Group "Alpha1-Liver", Germany; Medical Clinic III, Gastroenterology, Metabolic diseases and Intensive Care, University Hospital RWTH Aachen, Aachen, Germany.
2 Institute of Pathology, Medical University of Graz, Graz, Austria.
3 Coordinating Center for Alpha-1 Antitrypsin Deficiency-related Liver Disease of the European Reference Network on Hepatological Diseases (ERN RARE-LIVER) and the European Association for the Study of the Liver (EASL) Registry Group "Alpha1-Liver", Germany; Medical Clinic III, Gastroenterology, Metabolic diseases and Intensive Care, University Hospital RWTH Aachen, Aachen, Germany. Electronic address: pstrnad@ukaachen.de.