1. Department of Bacteriology I, National Institute of Infectious Diseases, Tokyo, Japan
2. Department of Clinical Infectious Diseases, Aichi Medical University, Aichi, Japan
3. WHO Collaborating Centre for Gonorrhoea and Other STIs, Department of Laboratory Medicine, Microbiology, Örebro University Hospital, Örebro, Sweden
4. Antimicrobial Resistance Research Center, National Institute of Infectious Diseases, Tokyo, Japan