1. Department of Pediatrics, University of California, 513 Parnassus Avenue, HSE 302, San Francisco, California 94143
2. Plexxikon Inc., 91 Bolivar Dr., Berkeley, California
3. Division of Pediatric Hematology and Oncology, Department of Pediatrics and Adolescent Medicine, University of Freiburg, Mathildenstrasse 1, 79106 Freiburg, Germany
4. Institute of Human Genetics, University of Erlangen-Nuremberg, 91054 Erlangen, Germany
5. Section for Pathology, Gade Institute, University of Bergen, Bergen, Norway
6. Department of Pathology, Haukeland University Hospital, Bergen, Norway
7. Comprehensive Cancer Center, University of California, San Francisco, California