1. National Reference Center for Neisseria gonorrhoeae, Department of Bacteriology, Hellenic Pasteur Institute,1
2. Laboratory of Antimicrobial Agents, Department of Microbiology, Athens University Medical School,2 and
3. Microbiology Laboratory, “Andreas Sygros” Hospital for Skin and Venereal Diseases,3 Athens, and
4. Microbiology Laboratory, Venereal Hospital of Thessaloniki, Thessaloniki,4 Greece