1. Department of Clinical EpidemiologyInstitute of Industrial Ecological Sciences, University of Occupational and Environmental Health
2. Department of UrologyUniversity of Occupational and Environmental Health
3. Department of Preventive MedicineGraduate School of Medical Sciences, Kyushu University
4. Fukuoka Institute of Occupational Health
5. Fukuoka Institute of Health and Environmental SciencesJapan