1 University of California San Francisco School of Medicine, San Francisco, California, USA.
2 Laboratory of Behavioral Neuroscience, Intramural Research Program, National Institute on Aging, Baltimore, Maryland, USA.
3 Clinical Research Unit, Intramural Research Program, National Institute on Aging, Baltimore, Maryland, USA.
4 Department of Dermatology, University of California San Francisco, San Francisco, California, USA; Dermatology Service, Veterans Affairs Health Care System, San Francisco, California, USA.
5 Department of Psychiatry and Behavioral Sciences, University of California San Francisco, San Francisco, California, USA; Department of Neurology, University of California San Francisco, San Francisco, California, USA; Department of Epidemiology & Biostatistics, University of California San Francisco, San Francisco, California, USA.
6 Department of Dermatology, University of California San Francisco, San Francisco, California, USA. Electronic address: Katrina.abuabara@ucsf.edu.