1. Department of Dermatology, Brugmann, St Pierre and Queen Fabiola University Hospitals; Université Libre de Bruxelles; Brussels Belgium
2. Department of Dermatology; University of Bern; Bern Switzerland
3. Centro de Dermatología Epidermis; Porto Portugal
4. Department of Dermatology; University of Ghent; Ghent Belgium
5. Formerly, Plastic Surgery Institute; Southern Illinois University, School of Medicine; Springfield IL USA
6. Hon. Pr. of the University of Franche-Comté; Nail Disease Center; Cannes France