1. Medical Engineering Program, Department of Mechanical Engineering, The University of Hong Kong, Hong Kong Special Administrative Region, China.
2. Department of Mechanical Engineering, The University of Hong Kong, Hong Kong Special Administrative Region, China.
3. Restorative Dentistry, School of Medicine and Dentistry—A2.237, James Cook University, Cairns Qld, Australia.
4. Department of Paediatrics and Adolescent Medicine, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong Special Administrative Region, China.