1. Division of Pathology; National Institute of Health Sciences; Tokyo Japan
2. Division of Oncological Pathology; Aichi Cancer Center Research Institute; Nagoya Japan
3. Chemicals Safety Department; Mitsui Chemicals Inc.; Mobara Japan
4. Department of Diagnostic Pathology I; Fujita Health University School of Medicine; Toyoake Japan
5. Biological Safety Research Center; National Institute of Health Sciences; Tokyo Japan
6. Japan Bioassay Research Center; Hadano Japan