1. Department of Dermatology, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang 150010, P.R. China
2. Department of Plastic Surgery, The Affiliated Tumor Hospital of Harbin Medical University, Harbin, Heilongjiang 150010, P.R. China
3. Department of Plastic Surgery, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang 150010, P.R. China