1. Section of Infection Control, Okayama University Hospital, and Department of Urology, Okayama University Medical School, Okayama 700-8558, Japan1;
2. Research and Medical Service, John D. Dingell VA Medical Center, and Division of Infectious Diseases, Wayne State University School of Medicine, Detroit, Michigan 482012; and
3. Department of Biologic and Materials Sciences, School of Dentistry, and Department of Microbiology/Immunology, School of Medicine, The University of Michigan, Ann Arbor, Michigan 481093