1. Medical Engineering Program, Department of Mechanical Engineering, University of Hong Kong, Hong Kong Special Administrative Region, China.
2. Department of Anatomy, University of Hong Kong, Hong Kong Special Administrative Region, China.
3. Department of Orthopaedics and Traumatology, University of Hong Kong, Hong Kong Special Administrative Region, China.
4. Wellman Center for Photomedicine, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts.