Tirza Blom, MD, Department of Dermatology, Amsterdam University Medical Centers, Amsterdam, the Netherlands.

Thomas Rustemeyer, Prof, dr. Department of Dermatology, Amsterdam University Medical Centers, Amsterdam, the Netherlands.

Correspondence: Tirza Blom, MD, Department of Dermatology, Amsterdam University Medical Centers, PO Box 22660, Meibergdreef 9, 1105 AZ Amsterdam, the Netherlands ([email protected]; [email protected]).

The authors declare no conflicts of interest related to this article.