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1 A case of fitness to work in a worker with COPD using the exercise stress test
Yewon Kim, Kyungyong Jung, Ji Young Ryu, Dae Hwan Kim, Sangyoon Lee
Ann Occup Environ Med.2015;27(1):26.  Published online 2015 December 11     DOI: http://dx.doi.org/10.1186/s40557-015-0074-z
      

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