[1
]
Department of Occupational and Environmental Health, Tokyo University of Science,
Noda, Japan.
[2
]
School of Life Science and Technology, Tokyo Institute of Technology, Yokohama, Japan.
[3
]
Department of Occupational and Environmental Health, Tokyo University of Science,
Noda, Japan; Department of Hygiene and Preventive Medicine, Showa University School
of Medicine, Tokyo, Japan.
[4
]
Department of Environmental and Preventive Medicine, Jichi Medical University School
of Medicine, Shimotsuke, Japan.
[5
]
Department of Occupational and Environmental Health, Tokyo University of Science,
Noda, Japan. Electronic address: gak@rs.tus.ac.jp.