1. Department of Neuromedicine and Movement Science, Faculty of Medicine and Health Sciences, Norwegian University of Science and Technology , Edvard Griegs gate 8, 7030, Trondheim , Norway
2. Department of Orthopaedics, Beijing Miyun District Hospital , Yanguang Street, 383, 101500, Beijing , China
3. Unicare Helsefort Rehabilitation Centre , Hysnesveien 11, 7112, Rissa , Norway
4. Department of Computer Sciences, Applied Mathematics and Statistics, University of Girona , Carrer Universitat de Girona 6, 17003, Girona , Spain