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Authors: Okihashi, Masahiro; Takatori, Satoshi; Kitagawa, Yoko; Tanaka, Yukio
Document Type: Research Article
Affiliations: Osaka Prefectural Institute of Public Health, Nakamichi 1-3-69, Higashinari-ku, Osaka 537-0025, Japan.
Publication date: July 1, 2007