1. Ophthalmology Department, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Beijing, China
2. Department of Clinical Laboratory, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Beijing, China
3. General Surgery Department, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Beijing, China
4. Department of Human Anatomy, Histology and Embryology, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, China