1 Department of Dermatology, Stanford University School of Medicine, Stanford, California.
2 Department of Dermatology, University of California San Francisco, San Francisco, California.
3 Department of Dermatology, Stanford University School of Medicine, Stanford, California; Dermatology Service, VA Palo Alto Healthcare System, Palo Alto, California. Electronic address: [email protected].
4 Department of Dermatology, Stanford University School of Medicine, Stanford, California. Electronic address: [email protected].