About the Authors

Shamima Akter

samimarub@yahoo.com

Affiliation Department of Epidemiology and Prevention, Center for Clinical Sciences, National Center for Global Health and Medicine, Tokyo, Japan

Hiroko Okazaki

Affiliation Mitsui Chemicals, Inc., Tokyo, Japan

Keisuke Kuwahara

Affiliations Department of Epidemiology and Prevention, Center for Clinical Sciences, National Center for Global Health and Medicine, Tokyo, Japan, Teikyo University Graduate School of Public Health, Tokyo, Japan

Toshiaki Miyamoto

Affiliation Nippon Steel & Sumitomo Metal Corporation Kimitsu Works, Chiba, Japan

Taizo Murakami

Affiliation JFE Steel Corporation, Kanagawa, Japan

Chii Shimizu

Affiliation JFE Steel Corporation, Kanagawa, Japan

Makiko Shimizu

Affiliation JFE Steel Corporation, Kanagawa, Japan

Kentaro Tomita

Affiliation Mitsubishi Plastics, Inc., Tokyo, Japan

Satsue Nagahama

Affiliation All Japan Labour Welfare Foundation, Tokyo, Japan

Masafumi Eguchi

Affiliation Furukawa Electric Co., Ltd., Tokyo, Japan

Takeshi Kochi

Affiliation Furukawa Electric Co., Ltd., Tokyo, Japan

Teppei Imai

Affiliation Azbil Corporation, Tokyo, Japan

Akiko Nishihara

Affiliation Azbil Corporation, Tokyo, Japan

Naoko Sasaki

Affiliation Mitsubishi Fuso Truck and Bus Corporation, Kanagawa, Japan

Tohru Nakagawa

Affiliation Hitachi, Ltd., Ibaraki, Japan

Shuichiro Yamamoto

Affiliation Hitachi, Ltd., Ibaraki, Japan

Toru Honda

Affiliation Hitachi, Ltd., Ibaraki, Japan

Akihiko Uehara

Affiliation YAMAHA CORPORATION, Shizuoka, Japan

Makoto Yamamoto

Affiliation YAMAHA CORPORATION, Shizuoka, Japan

Ai Hori

Affiliation Department of Safety and Health, Tokyo Gas Co., Ltd., Tokyo, Japan

Nobuaki Sakamoto

Affiliation Genkiplaza Medical Center for Health Care, Tokyo, Japan

Chiro Nishiura

Affiliation Department of Safety and Health, Tokyo Gas Co., Ltd., Tokyo, Japan

Takafumi Totsuzaki

Affiliation Mizuho Bank, Ltd., Tokyo, Japan

Noritada Kato

Affiliation Fuji Electric Co., Ltd., Kanagawa, Japan

Kenji Fukasawa

Affiliation Ricoh Co., Ltd., Kanagawa, Japan

Ngoc M. Pham

Affiliation Department of Epidemiology, Faculty of Public Health, Thai Nguyen University of Medicine and Pharmacy, Thai Nguyen Province, Vietnam

Kayo Kurotani

Affiliation Department of Epidemiology and Prevention, Center for Clinical Sciences, National Center for Global Health and Medicine, Tokyo, Japan

Akiko Nanri

Affiliation Department of Epidemiology and Prevention, Center for Clinical Sciences, National Center for Global Health and Medicine, Tokyo, Japan

Isamu Kabe

Affiliation Furukawa Electric Co., Ltd., Tokyo, Japan

Tetsuya Mizoue

Affiliation Department of Epidemiology and Prevention, Center for Clinical Sciences, National Center for Global Health and Medicine, Tokyo, Japan

Tomofumi Sone

Affiliation National Institute of Public Health, Saitama, Japan

Seitaro Dohi

Affiliation National Institute of Public Health, Saitama, Japan

the Japan Epidemiology Collaboration on Occupational Health Study Group

Membership of the Japan Epidemiology Collaboration on Occupational Health Study Group is provided in the Acknowledgments.

Competing Interests

H. Okazaki and S. Dohi belong to Mitsui Chemicals, Inc.; T. Miyamoto, Nippon Steel & Sumitomo Metal Corporation Kimitsu Works; T. Murakami, C. Shimizu, and M. Shimizu, JFE Steel Corporation. K. Tomita, Mitsubishi Plastics, Inc.; S. Nagahama, All Japan Labour Welfare Foundation; M. Eguchi, T. Kochi, and I. Kabe, Furukawa Electric Co., Ltd.; T. Imai and A. Nishihara, Azbil Corporation; N. Sasaki, Mitsubishi Fuso Truck and Bus Corporation; T. Nakagawa, S. Yamamoto, and T. Honda, Hitachi, Ltd.; A. Uehara, and M. Yamamoto, YAMAHA CORPORATION; A. Hori, and C. Nishiura, Tokyo Gas Co., Ltd.; N. Sakamoto, Genkiplaza Medical Center for Health Care; T. Totsuzaki, Mizuho Bank, Ltd.; N. Kato, Fuji Electric Co., Ltd.; K. Fukasawa, Ricoh Co., Ltd. H. Okazaki, S. Dohi, T. Murakami, C. Shimizu, and M. Shimizu, K. Tomita, M. Eguchi, T. Kochi, and I. Kabe, T. Imai and A. Nishihara, N. Sasaki, T. Nakagawa, S. Yamamoto, and T. Honda, A. Uehara, and M. Yamamoto, A. Hori, and C. Nishiura, N. Sakamoto, T. Totsuzaki, and N. Kato are the health professionals in each participating company. All authors declare no conflict of interest, patents, products in development or marketed products etc. This does not alter their adherence to PLOS ONE policies on sharing data and materials.

Author Contributions

Conceived and designed the experiments: SD T. Mizoue. Performed the experiments: SD T. Mizoue. Analyzed the data: SA. Wrote the paper: SA. Conducted data collection: K. Kuwahara K. Kurotani A. Nanri T. Mizoue. Provided databases for the research: HO T. Miyamoto T. Murakami CS MS KT SN ME TK TI A. Nishihara N. Sasaki TN SY TH AU MY A. Hori N. Sakamoto CN TT NK KF IK TS SD. Drafted the plan for the data analysis: SA HO K. Kuwahara T. Miyamoto T. Murakami CS MS KT SN ME TK TI A. Nishihara N. Sasaki TN SY TH AU MY A. Hori N. Sakamoto CN TT NK KF NMP K. Kurotani A. Nanri IK T. Mizoue TS SD. Provided statistical expertise: T. Mizoue K. Kuwahara.