1. Department of Experimental-Clinical and Health Psychology, Ghent University, Ghent, Belgium
2. Institute for Health and Behaviour, INSIDE, University of Luxembourg, Maison des Sciences Humaines, Esch-sur-Alzette, Luxembourg
3. Department of Pediatric Psychology, Ghent University Hospital, Ghent, Belgium
4. Department of Pediatric Rheumatology, Ghent University Hospital, Ghent, Belgium