1. Medical SchoolNanjing UniversityNanjingChina
2. State Key Laboratory of Pharmaceutical BiotechnologyNanjing UniversityNanjingChina
3. Jiangsu Key Laboratory of Molecular MedicineNanjing UniversityNanjingChina
4. Jiangsu Provincial Center for Disease Prevention and ControlNanjingChina
5. China Center for Disease Prevention and ControlBeijingChina
6. Veterinary and Biomedical SciencesUniversity of Minnesota–Twin CitiesSt. PaulMinnesotaUSA