Hua Jiang1, Xian Wei1, Xiaohai Zhu1, Hui Wang1, Qingfeng Li2. 1. Department of Plastic and Reconstructive Surgery, Changzheng Hospital, Second Military Medical University, Shanghai, China. 2. Department of Plastic and Reconstructive Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200011, China. Electronic address: dr.ligingfeng@yahoo.com.