1. Department of Computer Science, University of Verona, Verona, Italy
2. Department of Electronics, Information and Bioengineering, Politecnico di Milano, Milan, Italy
3. Center of Research in Biomedical Engineering, Universitat Politècnica de Catalunya, Barcelona, Spain
4. The BioRobotics Institute, Scuola Superiore Sant'Anna, Pisa, Italy
5. Department of Biomechanical Engineering, Delft University of Technology, Delft, The Netherlands
6. Department of Mechanical Engineering, KU Leuven, Leuven, Belgium