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Yoo Y, Ko HK, Han JJ, Lee Y, Seo KJ, Choung JT, Tockgo YC, Choe JG.Yoo Y, et al. Among authors: choung jt.J Asthma. 2007 Jan-Feb;44(1):45-9. doi: 10.1080/02770900601125607.J Asthma. 2007.PMID: 17365204
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