1 Department of Plastic and Cosmetic Surgery, Hunan Provincial People's Hospital, The First Affiliated Hospital of Hunan Normal University, Changsha 410005, Hunan Province, PR China. Electronic address: ligf01@126.com.
2 Department of Plastic and Cosmetic Surgery, Hunan Provincial People's Hospital, The First Affiliated Hospital of Hunan Normal University, Changsha 410005, Hunan Province, PR China.