1. Division of Molecular Medicine and Genetics, Department of Internal Medicine, the Life Sciences Institute, the Biomedical Research Core Facilities, Department of Human Genetics, Department of Pathology, and Program in Cell and Molecular Biology, University of Michigan, Ann Arbor, MI 48109
2. Institute of Biomedicine/Anatomy, University of Helsinki, FIN-00014 Helsinki, Finland
3. Programa de Recerca en Cancer, Institut Municipal d'Investigació Mèdica Hospital del Mar Universitat Pompeu Fabra, 08003 Barcelona, Spain
4. Institute of Pathology, Technical University of Munich, D-81675 Munich, Germany
5. The Finsen Laboratory, Department 3735, Rigshospitalet, DK-2200 Copenhagen N, Denmark