1. Cancer Imaging, British Columbia Cancer Research Centre and The University of British Columbia, Vancouver, B.C. V5Z 1L3, Canada
2. Cancer Imaging, British Columbia Cancer Research Centre, 601 West 10th Avenue, Vancouver, B.C. V5Z 1L3, Canada
3. Laboratory Medicine, British Columbia Cancer Agency, Vancouver, B.C. V5Z 4E6, Canada
4. Department of Surgery, Tokyo Medical College Hospital, Tokyo, Japan