[1] Univ Washington, Med Ctr, Dept Internal Med, Seattle, WA 98195 USA
[2] Univ Washington, Affiliated Hosp, Dermatol Residency Program, Seattle, WA 98195 USA
[3] Cleveland Clin, Dept Hosp Med, Cleveland, OH 44106 USA
[4] Johns Hopkins Sch Med, Dept Med, Baltimore, MD USA