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Abandon the comparative efficacy test for flavored products

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Retrieved 2012-05-15

Back to Journals International Journal of Chronic Obstructive Pulmonary Disease Volume 9 Issue 1 Comparison of clinical features between non-smokers with COPD and smokers with COPD: a retrospective observational study Authors Zhang J , Lin X, Bai C, Bai S Received 6 October 2013 Accepted for publication 11 November 2013 Published 8 January 2014 Volume 2014:9(1) Pages 5763 DOI Checked for plagiarism Yes Review by Single anonymous peer review Peer reviewer comments 3 Jing Zhang,* Xin-feng Lin,* Chun-xue Bai Department of Pulmonary Medicine, Zhongshan Hospital, Shanghai Medical College, Fudan University, Shanghai, People's Republic of China *These authors contributed equally to this paper Background: Smoking is a major risk factor for chronic obstructive pulmonary disease (COPD)