1. Department of Physiology, West Virginia University, West Virginia, USA
2. Institute of Fundamental and Clinical Human Movement Sciences, Free, University, the Netherlands
3. Integrated Biomedical Engineering for Restoration of Human Function, Biomedisch Technologisch Instituut, Department of Biomechanical Engineering, Universiteit Twente, the Netherlands
4. Department of Hand Surgery, Sahlgrenska University Hospital, Gothenburg, Sweden