1. Health Protection Agency, Public Health Laboratory Birmingham, Heart of England NHS Foundation Trust, Bordesley Green East, Birmingham, United Kingdom
2. Institute of Microbiology and Infection, Biosciences, University of Birmingham, Birmingham, United Kingdom
3. Medical Research Council Centre for Immune Regulation, Institute for Biomedical Research, College of Medical and Dental Sciences, University of Birmingham, Birmingham, United Kingdom
4. Department of Clinical Laboratory Medicine, Xiangya Hospital, Central South University, Changsha, China
5. Department of Microbiology, The Chinese University of Hong Kong, The Prince of Wales Hospital, Shatin, New Territories, Hong Kong SAR, China
6. MIDRU, Heartlands Hospital, Heart of England NHS Foundation Trust, Bordesley Green East, Birmingham, United Kingdom