1. Department of Pathology and Laboratory Medicine, Mount Sinai Hospital, Toronto, Ontario, Canada
2. Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Ontario, Canada
3. Department of Clinical Biochemistry, University Health Network, Toronto, Ontario, Canada
4. Professor of Medicine, Division of Gastroenterology, Hepatology and Nutrition, University of Pittsburgh Medical Center, Pittsburgh, PA
5. Surgical Department, University Hospital Mannheim, Mannheim, Germany
6. Associate Professor, Department of Pharmaceutical Sciences, Winthrop P. Rockefeller Cancer Institute, University of Arkansas for Medical Sciences, Little Rock, AR
7. Laboratory of Clinical Biochemistry, Unit of Cancer Research, Barcelona, Spain