1. Tianjin Medical University, No. 22, Qixiangtai Road, Heping District, Tianjin 300070, P.R. China
2. Key Research Laboratory of Tissue Repair and Regeneration of PLA, and Beijing Key Research Laboratory of Skin Injury, Repair and Regeneration, First Affiliated Hospital to the Chinese PLA General Hospital, 51 Fucheng Road, Beijing 100048, P.R. China
3. Wound Healing and Cell Biology Laboratory, Institute of Basic Medicine Science, College of Life Science, Chinese PLA General Hospital, 28 Fuxing Road, Beijing 100853, P.R. China
4. Wound Care Center, Institute of Basic Medicine Science, College of Life Science, Chinese PLA General Hospital, 28 Fuxing Road, Beijing 100853, P.R. China