1. Department of Plastic Surgery, Beijing Hospital, National Center of Gerontology, Institute of Geriatric Medicine, Chinese Academy of Medical Sciences, Beijing, People's Republic of China
2. Department of Dermatology, Air Force Characteristic Medical Center, Beijing, People's Republic of China
3. Department of Dermatology, Peking Union Medical College Hospital, Beijing, People's Republic of China
4. Huadong Medical Co. Ltd, Hangzhou, People's Republic of China