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Um, Sang-Won; Yoo, Chul-Gyu; Kim, Young Whan; Han, Sung Koo; Shim, Young-Soo
J Korean Med Sci 2007; 22: 839-45
Um, S. W.; Yoo, C. G.; Kim, Y. W.; Han, S. K.; Shim, Y. S.
J Korean Med Sci. 2007 Oct;22(5):839-45.