1 Division of Infectious Diseases and Global Public Health, Department of Medicine, University of California San Diego, 9500 Gilman Drive MC 0679, La Jolla, CA, 92093-0679, USA. gianella@ucsd.edu.
2 Department of Psychiatry, University of California San Diego, La Jolla, USA.
3 Division of Infectious Diseases and Global Public Health, Department of Medicine, University of California San Diego, 9500 Gilman Drive MC 0679, La Jolla, CA, 92093-0679, USA.
4 Division of Geriatrics, Gerontology and Palliative Care, University of California, La Jolla, USA.
5 Sam and Rose Stein Institute for Research on Aging, University of California San Diego, La Jolla, USA.
6 Department of Neurosciences, University of California San Diego, La Jolla, USA.