[1] Univ Paris 07, Hop St Louis, Serv Bacteriol, F-75475 Paris 10, France
[2] Univ Paris 07, Hop St Louis, Ctr Clin & Biol Maladies Sexuellement Transmissib, F-75475 Paris, France
[3] Univ Paris 07, Hop St Louis, Dept Biostat & Med Informat, F-75475 Paris 10, France