1. Flawless Motion Ltd, Auckland, New Zealand
2. Faculty of Health and Environmental Sciences, Health and Rehabilitation Research Institute, School of Clinical Sciences, Auckland University of Technology, Auckland, New Zealand
3. Department of Biostatistics and Epidemiology, Faculty of Health and Environmental Sciences, School of Public Health and Psychosocial Studies, Auckland University of Technology, Auckland, New Zealand
4. School of Health Sciences, University of Brighton, Brighton, UK