1. Department of Epidemiology, National Institute of Health, Tokyo,
2. Division of Wild Animal Medicine, Nippon Veterinary and Animal Science University, Tokyo,
3. Department of Biological Anthropology, Osaka University, Suita,
4. Clinical Research Centre for Allergy and Rheumatology, National Sagamihara Hospital, Sagamihara,
5. The Yamagata Prefectural Institute of Public Health, Yamagata; ,
6. Kowa Research Institute, Tsukuba,
7. Hayashibara Biochemical Laboratories, Okayama, Japan