1. Departments of Respiratory Diseases; Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences; Beijing 100730 China
2. Infectious Diseases, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences; Beijing 100730 China
3. Pathology, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences; Beijing 100730 China
4. Internal Medicine, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences; Beijing 100730 China
5. Hematology, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences; Beijing 100730 China