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Prevalence of chronic sputum and associated factors in Korean adults.
Lee BR, Kim YI, Kim S, Lee HS, Yoon SH, Yu JY, Ban HJ, Kwon YS, Oh IJ, Kim KS, Kim YC, Lim SC. Lee BR, et al. Among authors: kim yi, kim s, kim ks, kim yc. J Korean Med Sci. 2014 Jun;29(6):825-30. doi: 10.3346/jkms.2014.29.6.825. Epub 2014 May 30. J Korean Med Sci. 2014. PMID: 24932085 Free PMC article.
6,500 results