1. Surgical Bioengineering Laboratory, Department of Surgery, University of California, Davis School of Medicine, Sacramento, CA, USA
2. CIRM Bridges to Stem Cell Research Program, California State University, Sacramento, CA, USA
3. Institute for Paediatric Regenerative Medicine, Shriners Hospital for Children/UC Davis School of Medicine, Sacramento, CA, USA
4. Department of Burn and Plastic Surgery, The Third Xiangya Hospital of Central South University, Changsha, Hunan, P.R. China