1. Department of Surgery, The Chinese University of Hong Kong, Hong Kong
2. School of Computer Science and Engineering, Sun Yat-sen University, Guangzhou, China
3. Department of Surgery and the Chow Yuk Ho Technology Centre for Innovative Medicine, The Chinese University of Hong Kong, Hong Kong
4. Department of Surgery, Chow Yuk Ho Technology Centre of Innovative Medicine, Li Ka Shing Institute of Health Science, and Multi-scale Medical Robotics, Ltd., The Chinese University of Hong Kong, Hong Kong