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Jeen, YT; Chun, HJ; Song, CW; Um, SH; Lee, SW; Choi, JH; Kim, CD; Ryu, HS; Hyun, JH
Cho, Y. J.; Jeen, Y. T.; Kim, Y. S.; Chun, H. J.; Um, S. H.; Kim, C. D.; Ryu, H. S.