[1] Loyola Univ Chicago, Stritch Sch Med, Chicago, IL USA
[2] Univ Calif San Francisco, Dermatol, San Francisco, CA USA
[3] Calico Comp, Livermore, CA USA
[4] Univ Calif San Francisco, Sch Med, San Francisco, CA USA
[5] San Francisco VA Hlth Care Syst, Dermatol, San Francisco, CA USA