1. Department of Molecular Cell Biology, Samsung Biomedical Research Institute, Sungkyunkwan University School of Medicine, Suwon 440-746, Republic of Korea
2. Graduate School of Public Health, Seoul National University, Seoul 151-742, Republic of Korea
3. Water Environment Research Department, National Institute of Environmental Research, Incheon 404-708, Republic of Korea
4. Laboratory of Microbiology & BCCM/LMG Bacteria Collection, Faculty of Sciences, Ghent University, K.L. Ledeganchstraat 35, B-9000 Gent, Belgium
5. Institute for Medical Microbiology, Immunology and Hygiene, University of Cologne, Goldenfelsstrasse 19-21, 50935 Köln, Germany
6. Department of Infectious Diseases C5-P, Leiden University Medical Center, 2300 RC Leiden, The Netherlands