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1 Relationship of activities outside work to sleep and depression/anxiety disorders in Korean workers: the 4th Korean working condition survey
Sung Won Jung, Kyung-Jae Lee, Hee Sung Lee, Guang Hwi Kim, Jae Gwang Lee, Joo Ja Kim, June-Hee Lee
Ann Occup Environ Med.2017;29(1):51.  Published online 2017 October 11     DOI: http://dx.doi.org/10.1186/s40557-017-0206-8
      

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