1. Department of Pediatrics O.L. Vrouw Hospital Aalst Aalst Belgium
2. Department of Dermatology, Interdisciplinary Unit of Pediatric Dermatology Vrije Universiteit Brussel (VUB), Universitair Ziekenhuis Brussel (UZ Brussel) Brussels Belgium
3. Department of Pathology Vrije Universiteit Brussel (VUB), Universitair Ziekenhuis Brussel (UZ Brussel) Brussels Belgium