1. Department of Aesthetic Plastic Surgery Center, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, P. R. China
2. Department of Plastic Surgery, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, P. R. China
3. Department of General Surgery, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, P. R. China