1. Department of Pathology and Laboratory Medicine, Molecular Biology Institute, and Jonsson Comprehensive Cancer Center, School of Medicine, University of California—Los Angeles, Los Angeles, California 90095
2. Division of Endocrinology and Metabolism
3. Departments of Pharmacology and Toxicology and of Oncology, Regional London Cancer Centre, University of Western Ontario, London, Ontario, Canada
4. Howard Hughes Medical Institute, University of California, San Diego, La Jolla, California 92093