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Masakazu Kurata
Department of Preventive Medicine and Public Health, School of Medicine, Keio University
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Shôhei Arai
Department of Preventive Medicine and Public Health, School of Medicine, Keio University
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Kazuo Toyoda
Department of Preventive Medicine and Public Health, School of Medicine, Keio University
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Hirozumi Ishihara
Shibuya Health Center