1. Department of Mechanical and Automation Engineering and T Stone Robotics Institute, The Chinese University of Hong Kong, Hong Kong
2. Division of Neurosurgery, Department of Surgery, The Chinese University of Hong Kong, Hong Kong
3. Department of Mechanical and Automation Engineering, T Stone Robotics Institute, Shun Hing Institute of Advanced Engineering, The Chinese University of Hong Kong and Multi-Scale Medical Robotics Center, Shatin, New Territories, Hong Kong