1. Clinical and Research Center of Infectious Diseases, Beijing Ditan Hospital, Capital Medical University
2. The National Clinical Key Department of Infectious Diseases, Beijing Ditan Hospital, Capital Medical University
3. Department of Infectious Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Science & Peking Union Medical College
4. Clinical and Research Center of Infectious Diseases, Beijing Ditan Hospital, Health Science Center, Beijing University
5. Division of Medical Records and Statistics, Beijing Ditan Hospital, Capital Medical University