1. Department of Dermatology; University Hospitals Leuven; Leuven Belgium
2. Department of Pediatric Rheumatology; University Hospitals Leuven; Leuven Belgium
3. Department of Pediatric Orthopedics; University Hospitals Leuven; Leuven Belgium
4. Department of Ophthalmology; University Hospitals Leuven; Leuven Belgium
5. Center for Human Genetics; University Hospitals Leuven; Leuven Belgium