1 Department of Research, Telemark Hospital, Skien, and Institute of Clinical Medicine, University of Oslo, Oslo, Norway.
2 Institute of Clinical Medicine, University of Oslo, Oslo, and Department of Research, Vestfold Hospital, Tønsberg, Norway.
3 Department of Breast and Endocrine Surgery, Stavanger University Hospital, Stavanger, Norway.
4 Department of Breast and Endocrine Surgery, Akershus University Hospital, Campus Oslo, Lørenskog, Norway.
5 Department of Breast and Endocrine Surgery, Telemark Hospital, Skien, Norway.
6 Department of Medicine, Telemark Hospital, Skien, Norway.
7 Department of Pathology, Telemark Hospital Skien, Norway.
8 Department of Gastrointestinal Surgery, Stavanger University Hospital, Stavanger, Norway.
9 Department of Surgery, Telemark Hospital, Skien, Norway.
10 Department of Research, Stavanger University Hospital, Stavanger, and Department of Clinical Science, Faculty of Medicine, University of Bergen, Bergen, Norway.
11 Department of Research, Stavanger University Hospital, and Department of Mathematics and Physics, University of Stavanger, Stavanger, Norway.
12 Department of Research, Stavanger University Hospital, Stavanger, and Department of Clinical Science, University of Bergen, Bergen, Norway.