1. Karolinska Institutet Ming Wai Lau Centre for Reparative Medicine, 15W Science Park W Ave, 999077 Sha Tin, Hong Kong
2. Department of Materials Science and Engineering, Department of Physics and Department of Biomedical Engineering, City University of Hong Kong, 999077 Kowloon Tong, Hong Kong
3. Developmental and Regenerative Biology TRP, School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, 518172 Ma Liu Shui, Hong Kong