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Association between occupational exposure and the clinical characteritics of COPD. Open access. http://t.co/CJFdoTu5
Association between occupational exposure and the clinical characteritics of COPD. Open access. http://t.co/CJFdoTu5
Association between occupational exposure and the clinical characteritics of COPD. Open access. http://t.co/fJNXa0jR
Association between occupational exposure and the clinical characteritics of COPD. Open access. http://t.co/JHO8hHkS
Exposure to vapor, dust, gas or fumes and the clinical characteristics of COPD. Full text. http://t.co/CJFdoTu5