Abstracts from japanese journal of hygiene (Nihoneiseigakuzasshi) Vol.52 No.2

¹Department of Health Administration, Faculty of Medicine, University of Tokyo, Tokyo

²Osaka Prefectural College of Health Science, Habikino

³Faculty of Pharmaceutical Sciences, Kinki University, Higashi-Osaka

⁴Gifu-shi Central Public Health Center, Gifu

⁵Department of Hygiene, Gifu University School of Medcine, Gifu

⁶Research Center of Comprehensive Medicine, School of Medicine, University of the Ryukyus, Okinawa

⁷Chubu Public Health Research Center, Iida

⁸Department of Preventive Medicine, School of Medicine, University of the Ryukyus, Okinawa

⁹Department of Hygiene and Public health, Faculty of Medicine, Kagawa Medical University, Kagawa

¹¹Human Environmental Science Research Laboratory, Kurashiki University of Science and Arts, Kurashiki

¹⁰Marugame Public Health Center, Kagawa Prefectural Government, Marugame

¹²Department of Community Health Science, Saga Medical School, Saga

¹³Department ofHygiene and Preventive Medicine, Okayama University Medical School, Okayama

¹⁴Department of Mathematical Information Science, Okayama University of Science, Okayama

¹⁵Institute of Health Science, Kyusyu University, Kasuga

¹⁶College of Liberal Arts, Himeji Dokkyo University, Himeji