[1] Univ Med Ctr Utrecht, Dept Dermatol Allergol, G02-124,Heidelberglaan 100, NL-3584 CX Utrecht, Netherlands
[2] Publ Hlth Serv Amsterdam, STI Outpatient Clin, Publ Hlth Lab, Dept Infect Dis, POB 2200, NL-1000 CE Amsterdam, Netherlands
[3] Univ Amsterdam, Acad Med Ctr, Amsterdam Infect & Immun Inst, Amsterdam, Netherlands
[4] Univ Amsterdam, Acad Med Ctr, Dept Dermatol, Amsterdam, Netherlands