1. Stem Cell Laboratory, Department of Medical Research and Education, Taipei Veterans General Hospital, Taipei, Taiwan
2. Department of Biology, Case Western Reserve University, Cleveland, OH, USA
3. Orthopaedics and Traumatology, Taipei Veterans General Hospital, Taipei, Taiwan
4. Department of Medical Research, Taipei Veterans General Hospital, Taipei, Taiwan
5. Institute of Clinical Medicine, National Yang-Ming University, Taipei, Taiwan
6. Institute of Pharmacology, Faculty of Medicine, National Yang-Ming University, Taipei, Taiwan