1. Research Service, Veterans Affairs San Diego Healthcare System, San Diego, CA, USA
2. Department of Psychiatry, University of California, San Diego School of Medicine, La Jolla, CA, USA
3. Department of Neurology, Boston University School of Medicine, Boston, MA, USA
4. The Framingham Heart Study, Framingham, MA, USA
5. Department of Biostatistics, Boston University School of Public Health, Boston, MA, USA
6. Department of Psychology, University of Southern California, Los Angeles, CA, USA
7. Department of Geriatrics and Gerontology, Rowan University School of Osteopathic Medicine, Stratford, NJ, USA
8. Division of Endocrinology, Brigham and Women’s Hospital and Harvard Medical School, Boston, MA, USA