1. Medical Biotechnology Center, Institute of Medical Biology, University of Southern Denmark, Winsloewparken 25. 3, DK-5000 Odense C, Denmark, Department of Biochemistry and Molecular Biology, University of Southern Denmark, Campusvej 55, DK-5230 Odense M, Denmark, and Department of Oncology, Odense University Hospital, Soendre Boulevard 29, DK-5000 Odense C, Denmark