1. Tissue Repair and Regeneration Program, Institute of Health and Biomedical Innovation, Queensland University of Technology, Brisbane, Australia;
2. Institute of Medical Biology, Agency for Science, Technology and Research (A*STAR), Singapore;
3. Skin Research Institute of Singapore, A*STAR, Singapore;
4. Guangdong Province Key Laboratory of Stomatology, Department of Operative Dentistry and Endodontics, Guanghua School of Stomatology, Sun Yat-sen University, Guangzhou, People's Republic of China