1 University of California, San Francisco, UCSF School of Medicine, San Francisco, California, USA.
2 University of California, San Francisco, Department of Dermatology, San Francisco, California, USA.
3 University of California, San Francisco, Department of Dermatology, San Francisco, California, USA; Zuckerberg San Francisco General Hospital (ZSFGH), Department of Dermatology, San Francisco, California, USA.
4 University of California, San Francisco, Department of Dermatology, San Francisco, California, USA; Zuckerberg San Francisco General Hospital (ZSFGH), Department of Dermatology, San Francisco, California, USA. Electronic address: Erin.Amerson@ucsf.edu.