1. Department of Geriatrics, The First Affiliated Hospital Zhejiang University School of Medicine Hangzhou China
2. Center for Applied Statistics, School of Statistics Renmin University of China Beijing China
3. School of Ecology and Environment Anhui Normal University Wuhu China
4. Jericho High School New York USA
5. Research Center for Humanities and Social Sciences, Academia Sinica Taipei Taiwan
6. Science and Technology Division, Beijing Chest Hospital Capital Medical University Beijing China
7. Beijing Tuberculosis and Thoracic Tumor Research Institute Beijing China
8. Department of Infectious Diseases Zhejiang Provincial Center for Disease Control and Prevention Hangzhou China