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. Department of Primary and Community Care, Radboud University Medical Center, PB 9101, 6500 HB Nijmegen, The Netherlands
4. RIVM/Dutch WHO-FIC Collaborating Centre, PB 1, 3720 BA Bilthoven, The Netherlands