1. Israel Sport Centre for the Disabled (ISCD) Ilan Spivak, Ramat Gan 52535, Israel
2. Faculty of Medicine and Health Sciences, University of Alcalá, 28807 Alcalá de Henares, Spain
3. WHO-FIC Collaborating Centre RIVM, 3720 Bilthoven, The Netherlands
4. Department of Primary and Community Care, Radboud University Medical Centre, 6500 Nijmegen, The Netherlands