1. Department of Public Health, Ghent University Hospital, Ghent, Belgium
2. Department of Dermatology, Ghent University Hospital, Ghent, Belgium
3. currently in private practice in Maldegem, Belgium
4. Department of Medical Oncology, Ghent University Hospital, Ghent, Belgium
5. Department of Dermatology, Institut Roi Albert II, Cliniques Universitaires Saint-Luc, Université Catholique de Louvain, Brussels, Belgium
6. Institute of Health and Society, Université Catholique de Louvain, Brussels, Belgium