1. Research Group Empowering Healthy Behaviour, Department of Health Innovation and Technology, Fontys University of Applied Sciences, Eindhoven, The Netherlands
2. Physical Therapy Research, Department of Rehabilitation, Physiotherapy Science and Sport, University Medical Center Utrecht Brain Center, Utrecht University, Utrecht, The Netherlands
3. Foundation Surftherapie.nl, Petten, The Netherlands
4. Current Address: Department Surfkliniek B.V, Surftherapiecentrum.nl, Petten, The Netherlands
5. Department of Health Sciences, College of Health, Medicine and Life Sciences, Brunel University London, London, UK
6. School of Applied Sciences, Edinburgh Napier University, Edinburgh, UK
7. Center for Physical Therapy Research and Innovation in Primary Care, Julius Health Care Centers, Utrecht, The Netherlands