1. Department of Surgery, University of Toronto, Toronto, Ontario, Canada
2. Institute of Health Policy, Management and Evaluation, Dalla Lana School of Public Health, University of Toronto, Toronto, Ontario, Canada
3. University Health Network, HPB Surgical Oncology, Toronto, Ontario, Canada
4. Library and Information Services, University Health Network, Toronto, Canada
5. Department of Medicine, University of Toronto, Toronto, Ontario, Canada
6. Toronto Centre for Liver Disease, Toronto General Hospital, University Health Network, Toronto, Canada
7. Department of Epidemiology & Biostatistics, Erasmus MC, Rotterdam, the Netherlands.