1. Department of Respiratory Medicine, Nanjing First Hospital, Nanjing Medical University, Nanjing, China
2. NHC Key laboratory of Enteric Pathogenic Microbiology, Jiangsu Provincial Center for Diseases Control and Prevention, Nanjing, China
3. Department of Laboratory Medicine, Nanjing First Hospital, Nanjing Medical University, Nanjing, China
4. Department of Pathology Medicine, Nanjing First Hospital, Nanjing Medical University, Nanjing, China
5. Department of Gerontology Medicine, Affiliated Hospital of Integrated Traditional Chinese and Western Medicine, Nanjing University of Chinese Medicine, Jiangsu Province Academy of Traditional Chinese Medicine, Nanjing, China.