1. Department of Infectious Diseases, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui, China
2. Anhui Center for Surveillance of Bacterial Resistance, Hefei, Anhui, China
3. Xiangya School of Medicine, Central South University, Changsha, Hunan, China
4. Department of Infectious Diseases, The Chaohu Affiliated Hospital of Anhui Medical University, Hefei, Anhui, China