[1] Univ Hosp Munster, Dept Periodontol, D-48149 Munster, Germany
[2] Univ Hosp Munster, Inst Hyg, D-48149 Munster, Germany
[3] Hop Edouard Herriot, Cent Microbiol Lab, Lyon, France
[4] Univ Bath, Dept Biol & Biochem, Bath BA2 7AY, Avon, England
[5] Univ Libre Bruxelles, Hop Erasme, Dept Microbiol, Brussels, Belgium
[6] Hvidovre Univ Hosp, Dept Clin Microbiol, Hvidovre, Denmark
[7] Univ Nova Lisboa, Inst Tecnol Quim & Biol, P-2780 Oeiras, Portugal
[8] Hlth Protect Agcy, Ctr Infect, London, England
[9] Natl Inst Publ Hlth & Environm, Diagnost Lab Infect Dis, NL-3720 BA Bilthoven, Netherlands
[10] Ctr Dis Control & Prevent, Div Healthcare Qual Promot, Atlanta, GA USA
[11] Robert Koch Inst, Wernigerode, Germany
[12] Univ Hosp Wurzburg, Inst Hyg & Microbiol, Wurzburg, Germany
[13] Natl Inst Communicable Dis Prevent & Control, State Key Lab Infect Dis Prevent & Control, Beijing, Peoples R China