1. Science for Life Laboratory, Department of Oncology-Pathology, Karolinska Institutet, S-171 76 Stockholm, Sweden
2. Department of Biochemistry and Biophysics, Stockholm University, S-106 91 Stockholm, Sweden
3. Department of Clinical and Molecular Medicine, Norwegian University of Science and Technology, Trondheim, Norway
4. Department of Pathology, St. Olavs Hospital, Trondheim, Norway
5. Sheffield Cancer Centre, Department of Oncology and Metabolism, University of Sheffield, Sheffield S10 2RX, UK