Department of Plastic and Reconstructive Surgery, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui Province, China; Department of Plastic and Reconstructive Surgery, The Second Affiliated Hospital of Anhui Medical University, Hefei, Anhui Province, China. Department of Plastic and Reconstructive Surgery, The Second Affiliated Hospital of Anhui Medical University, Hefei, Anhui Province, China; Department of Plastic and Reconstructive Surgery, Anqing municipal hospital, Anqing, Anhui Province, China. Department of Plastic and Reconstructive Surgery, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui Province, China. Electronic address: zhaoyuaps@163.com. Department of Plastic and Reconstructive Surgery, The Second Affiliated Hospital of Anhui Medical University, Hefei, Anhui Province, China.