1 Rehabilitation Medicine Research Group, Department of Health Sciences, Lund University, Lund, Sweden kristina.fagher@med.lu.se.
2 Department of Physical Medicine and Rehabilitation, Spaulding Rehabilitation Hospital/Harvard Medical School, Boston, Massachusetts, USA.
3 IOC Research Center, South Africa, South Africa.
4 Institute of Sport and Exercise Medicine, Department of Sport Science, Stellenbosch University, Cape Town, South Africa.
5 Department of Physical Medicine and Rehabilitation, Spaulding Rehabilitation; Spaulding Hospital/Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA.