1. University Hospital, Department of Dermatology, Ghent, Belgium
2. University Hospital, Department of Dermatology, Liége Belgium
3. University Hospital, Department of Dermatology, Edegem, Belgium
4. Private practice, Kortrijk, Belgium
5. General Hospital St-Jan, Department of Dermatology, Brugge, Belgium
6. Private practice, Mouscron, Belgium
7. Private practice, Hasselt, Belgium
8. Innogenetics, Gent, Belgium
9. XCEL Lentis, Merelbeke, Belgium