1 Division of Plastic Surgery, Plastic Surgery Hospital/Institute, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100144, China; Division of Plastic Surgery, Massachusetts General Hospital-Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, USA. Electronic address: chm762@mail.harvard.edu.
2 Department of Auricular Reconstruction, Plastic Surgery Hospital/Institute, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 10144, China. Electronic address: helerenpumc@163.com.