1. Department of Medical Sciences, Uppsala University, Uppsala/Eastern European Committee of Swedish Health Care Community, Stockholm, Sweden
2. DO Ott Institute of Obstetrics and Gynecology, RAMS, St Petersburg, Russia
3. St Petersburg State Medical University, St. Petersburg, Russia
4. Swedish Reference Laboratory for Pathogenic Neisseria, Department of Laboratory Medicine, Microbiology, Örebro University Hospital, Örebro, Sweden
5. Division of STD Prevention, Centers for Disease Control and Prevention (CDC), Atlanta, GA, USA