1. Department of Bacteriology Yokohama City University School of Medicine; Urafune-cho Minami-ku Yokohama, Kanagawa 232
2. Department of Ophthalmology; Yokohama City University School of Medicine; Urafune-cho Minami-ku Yokohama, Kanagawa 232
3. Department of Pediatrics; Yokohama City University School of Medicine; Urafune-cho Minami-ku Yokohama, Kanagawa 232
4. Department of Allergology, Institute of Medical Science; The University of Tokyo; Shirokanedai Minato-ku, Tokyo 108