1. Faculty of Medicine, University of New South Wales, Sydney 2052, Australia
2. Wearables and Gait Analysis Research Group (WAGAR), Sydney 2031, Australia
3. NeuroSpine Surgery Research Group (NSURG), Sydney 2031, Australia
4. NeuroSpine Clinic, Prince of Wales Private Hospital, Sydney 2031, Australia
5. Department of Neurosurgery, Prince of Wales Hospital, Sydney 2052, Australia