1. Center for Stem Cell Research, Wan Fang Hospital, Taipei Medical University, Taipei, Taiwan
2. Department of Orthopaedic Surgery, Taipei City Hospital, Taipei, Taiwan
3. Institute of Clinical Medicine, National Yang-Ming University, Taipei, Taiwan
4. Stem Cell Research Center, National Yang-Ming University, Taipei, Taiwan
5. Department of Ophthalmology, Wan Fang Hospital, Taipei Medical University, Taipei, Taiwan
6. Graduate Institute of Clinical Medicine, Taipei Medical University, Taipei, Taiwan