1. Surgery Research Unit, Cancer and Translational Medicine Research Unit, Medical Research Center, University of Oulu and Oulu University Hospital, Oulu, Finland
2. Surgery Research Unit, Oulu University Hospital, Oulu, Finland
3. Department of Pathology, Oulu University Hospital, Oulu, Finland
4. Department of Pathology, Jyväskylä Central Hospital, Jyväskylä, Finland