1 Clinical Motion Analysis Laboratory, University Hospital Leuven, Leuven, Belgium,
2 KU Leuven Department of Rehabilitation Sciences, Leuven, Belgium,
3 KU Leuven Department of Mechanical Engineering, Leuven, Belgium,
4 KU Leuven Department of Development and Regeneration, Leuven, Belgium,
5 Department of Orthopaedics, University Hospital Leuven, Leuven, Belgium.