1 Department of Gastroenterology, Gazi Yaşargil Education and Research Hospital, Diyarbakir, Turkey.
2 Department of Medicine-3, Rheumatology and Immunology, Friedrich Alexander University of Erlangen-Nuremberg and Universitätsklinikum Erlangen, Erlangen, Germany.
3 Division of Gastroenterology and Liver Unit, University of Alberta, Edmonton, Canada.
4 Division of Gastroenterology, University of British Columbia and Vancouver General Hospital, Canada.
5 Hepatology Division, Centre for Digestive Diseases, Karolinska Institutet and Karolinska University Hospital, Stockholm, Sweden.