1. Department of Dermatology; University Hospitals Leuven; Leuven Belgium and Department of Microbiology and Immunolgy KU Leuven, Belgium
2. Department of Pediatrics; University Hospitals Leuven; Leuven Belgium
3. Department of Dermatology; Academic Medical Centre; Amsterdam The Netherlands
4. Department of Human Genetics; University Hospitals Leuven; Leuven Belgium
5. Department of Pathology; University Hospitals Leuven; Leuven Belgium
6. Laboratory of Pediatric Immunology; KU Leuven; Leuven Belgium