1. EHJ Hulzebos, PT, MSc, is Physiotherapist and Human Movement Scientist, Rudolf Magnus Institute for Neuroscience, Department of Rehabilitation, Section of Physical Therapy, University Medical Center Utrecht, Room F 00.810, PO Box 85500, 3508 GA Utrecht, the Netherlands.
2. NLU Van Meeteren, PT, PhD, is Associate Professor, Rudolf Magnus Institute for Neuroscience, Department of Rehabilitation, Section of Physical Therapy, University Medical Center Utrecht, and Head, Department of Physiotherapy, Academy of Health Sciences Utrecht, Utrecht, the Netherlands
3. RA De Bie, PT, PhD, is Epidemiologist, Department of Epidemiology, University of Maastricht, Maastricht, the Netherlands
4. PC Dagnelie, PhD, is Nutritional Epidemiologist, Department of Epidemiology, University of Maastricht
5. PJM Helders, PT, PhD, is Clinical Professor, Department of Paediatric Physical Therapy, University Medical Center Utrecht, and Professor, Department of Physiotherapy, Academy of Health Sciences Utrecht