1 Department of Psychiatry, University of California San Diego School of Medicine, San Diego, California, USA.
2 University of California San Diego Herbert Wertheim School of Public Health and Human Longevity Science, San Diego, California, USA.
3 Department of Medicine, Division of Geriatrics, Gerontology and Palliative Care, University of California San Diego School of Medicine, San Diego, California, USA.
4 University of Texas at Austin School of Social Work, Austin, Texas, USA.