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Imai, Teppei, Keisuke Kuwahara, Toshiaki Miyamoto, Hiroko Okazaki, Akiko Nishihara, Isamu Kabe, Tetsuya Mizoue, και Seitaro Dohi. "Validity and Reproducibility of Self-reported Working Hours Among Japanese Male Employees." J Occup Health 2016.

Imai, Teppei, et al. "Validity and Reproducibility of Self-reported Working Hours Among Japanese Male Employees." J Occup Health 2016.