1. Department of Molecular and Cellular Biology; Nagoya City University Graduate School of Medical Sciences; Nagoya Aichi Japan
2. Department of Orthopaedic Surgery; Shizuoka Medical Center; National Hospital Organization; Suntou-gun Shizuoka Japan
3. Departments of Medicine; Microbiology and Immunology; University of California; San Francisco, San Francisco CA USA
4. Department of Microbiology and immunology; Stanford University School of Medicine; Stanford CA USA