1. Auckland Bioengineering Institute; The University of Auckland; Auckland New Zealand
2. Department of Engineering Science; The University of Auckland; Auckland New Zealand
3. Department of Neurorehabilitation Engineering; University Medical Center Göttingen; Göttingen Germany
4. Griffith Health Institute; Griffith University; Queensland Australia
5. Department of Orthopaedic Surgery, Faculty of Medicine; The University of Auckland; Auckland New Zealand