1. University of Southern California Keck School of Medicine, Los Angeles, California.
2. Department of Neurosurgery, University of California–Los Angeles David Geffen School of Medicine, Los Angeles, California.
3. Division of Endocrinology and Gonda Diabetes Center, University of California–Los Angeles School of Medicine, Los Angeles, California.
4. Division of Endocrinology, Department of Medicine, Harbor–University of California–Los Angeles (UCLA) Medical Center, Los Angeles Biomedical Research Institute at Harbor–UCLA Medical Center, Torrance, and UCLA David Geffen School of Medicine, Los Angeles, California.
5. Departments of Medicine and Epidemiology and Biostatistics, University of California–San Francisco Schools of Medicine, San Francisco, California.
6. Brain Tumor Center, John Wayne Cancer Institute at Saint John's Health Center, Santa Monica, California.