1 Division of Geriatrics, University of California San Francisco, San Francisco, CA, USA; Bakar Aging Research Institute, University of California San Francisco, San Francisco, CA, USA.
2 Dermatology Service, San Francisco Veterans Affairs Health Care System, CA, USA.
3 Department of Dermatology, Tongren Hospital, Shanghai Jiao Tong Univ School of Medicine, Shanghai, China.
4 Biomedical Sciences Graduate Program, University of California San Francisco, San Francisco, CA, USA.
5 Department of Dermatology, Vanderbilt University Medical Center, Nashville, TN, USA.
6 Department of Dermatology, University of California San Francisco, San Francisco, CA, USA.
7 Division of Plastic and Reconstructive Surgery, University of California, San Francisco, San Francisco, CA, USA.
8 Dermatology Service, San Francisco Veterans Affairs Health Care System, CA, USA; Department of Dermatology, University of California San Francisco, San Francisco, CA, USA. Electronic address: thea.mauro@ucsf.edu.