1. Department of Surgery, University of Vermont College of Medicine, Burlington, Vermont, USA;
2. Department of Clinical Epidemiology, Aarhus University Hospital, Aarhus, Denmark;
3. Department of Epidemiology, Rollins School of Public Health, Emory University, Atlanta, Georgia, USA;
4. Institute of Pathology, Aarhus University Hospital, Aarhus, Denmark;
5. Department of Pathology, Hvidovre Hospital, Hvidovre Municipality, Denmark