1 Granada Hills, Los Angeles, CA, USA. The Cochrane Hepato-Biliary Group, Copenhagen Trial Unit, Centre for Clinical Intervention Research, Department 7812, Rigshospitalet, Copenhagen University Hospital, Copenhagen, Denmark. Department of Cardiology, Holbaek Hospital, Holbaek, Denmark. Copenhagen Trial Unit, Centre for Clinical Intervention Research, Department 7812, Rigshospitalet, Copenhagen University Hospital, Copenhagen, Denmark. Department of Gastroenterology, Clinical Hospital Centre Rijeka, Rijeka, Croatia. Medical Faculty, University of Nis, Nis, Serbia. Department of Internal Medicine, Medical Faculty, University of Nis, Nis, Serbia.