1. Clinical Microbiology Laboratory, Department of Nosocomial Infection Control, Children's Hospital of Fudan University, Shanghai, China
2. Institute of Antibiotics, Huashan Hospital, Fudan University, Shanghai, China
3. Key Laboratory of Clinical Pharmacology of Antibiotics, Ministry of Health, Shanghai, China
4. Department of Laboratory Medicine, Shanghai Tenth People's Hospital, Tongji University, Shanghai, China