1. Department of Infectious Diseases, Nanjing Drum Tower HospitalMedical School of Nanjing University 210008 Nanjing Jiangsu China
2. Department of Laboratory Medicine, Nanjing Drum Tower HospitalMedical School of Nanjing University 210008 Nanjing Jiangsu China
3. Department of Experimental Medicine, Nanjing Drum Tower HospitalMedical School of Nanjing University 210008 Nanjing Jiangsu China
4. Department of MedicineUniversity of Massachusetts Medical School 01605 Worcester MA USA