[1] Univ Calif San Francisco, Sch Med, Dept Dermatol, San Francisco, CA USA
[2] Univ Calif San Francisco, Helen Diller Family Comprehens Canc Ctr, San Francisco, CA USA
[3] Vet Affairs Med Ctr, Dermatol Serv, San Francisco, CA 94121 USA
[4] Zuckerberg San Francisco Gen Hosp & Trauma C, Dermatol Serv, San Francisco, CA USA