1. Department of Dermatology Ghent University Hospital Ghent Belgium
2. Private practice Tremelo Belgium
3. Dermatology Cliniques Saint‐Luc Université Catholique de Louvain Brussels Belgium
4. Dermatology University Hospital Leuven Leuven Belgium
5. Dermatology Centre Hospitalier Universitaire de Liège Liège Belgium
6. Dermatology Erasme Hospital Université Libre de Bruxelles Brussels Belgium
7. Dermatology University Hospital of Antwerp Antwerp Belgium