1. School of Life Sciences, Yunnan Normal University, Kunming, Yunnan 650500, China.
2. Departments of Dermatology and Ophthalmology, Institute for Regenerative Cures, School of Medicine, University of California at Davis, Davis, CA 95817, USA.
3. Department of Cell Biology and Anatomy, Johns Hopkins University, School of Medicine, Baltimore, MD 21205, USA.
4. Department of Biomedical Engineering, University of California at Davis, Davis, CA 95616, USA.
5. State Key Laboratory of Trauma, Burns and Combined Injury, Third Military Medical University, Chongqing 400042, China.
6. Courant Institute and Department of Biology, New York University, 251 Mercer Street, New York, NY 10012, USA.