1. Department of Abdominal Surgery, Helsinki University Hospital and University of Helsinki, Helsinki, Finland
2. Department of Transplantation and Liver Surgery, Helsinki University Hospital and University of Helsinki, Helsinki, Finland
3. Department of Internal Medicine, American University of Beirut, Beirut, Lebanon
4. Department of Clinical Epidemiology and Biostatistics, McMaster University, Hamilton, Canada
5. Department of Medicine, McMaster University, Hamilton, Canada
6. Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada
7. University of Balamand, Tripoli, Lebanon
8. Department of Medicine, Innlandet Hospital Trust, Gjøvik, Norway
9. Division of General Internal Medicine, Department of Clinical Epidemiology, University Hospitals of Geneva, Geneva, Switzerland
10. Department of Urology and Public Health, Helsinki University Hospital and University of Helsinki, Helsinki, Finland