1. Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100050, PR China
2. Department of Microbiology and Molecular Genetics, University of the Punjab, Quid-i-Azam Campus, Lahore 54590, Pakistan
3. College of Basic Medical Sciences, Guilin Medical University, Guilin 541004, PR China
4. Beijing Key Laboratory of Antimicrobial Agents, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100050, PR China