1. Department of Sport and Rehabilitation Sciences, University of Liege, Liege, Belgium.
2. Spine Clinics, Liege University Hospital Center, Liege, Belgium.
3. Faculty of Motor Sciences at Université Catholique de Louvain-La-Neuve, UCLouvain, Louvain, Belgium.
4. Department of Public Health, University of Liège, Liège, Belgium.