[1] Univ Iowa, Carver Coll Med, Iowa City, IA 52242 USA
[2] Univ Iowa Hosp & Clin, Dept Dermatol, 200 Hawkins Dr, Iowa City, IA 52242 USA
[3] Univ Iowa Hosp & Clin, Dept Dermatol Pathol & Infect Dis, 200 Hawkins Dr, Iowa City, IA 52242 USA
[4] VA Med Ctr, 200 Hawkins Dr, Iowa City, IA 52242 USA