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Yu, J.; Yoo, Y.; Kim, D. K.; Koh, Y. Y.
Allergy Asthma Proc. 2005 Sep-Oct;26(5):366-72.
Yoo, Y.; Choung, J. T.; Yu, J.; Kim do, K.; Choi, S. H.; Koh, Y. Y.
Chest. 2007 Jul;132(1):106-11. Epub 2007 May 15.