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Ryoo BY, Kang YK, Im YH, Kim YJ, Kim BS, Kim TY, Jung SH, Park JH, Baek HJ, Kim YC, Shim YM, Kim CM, Zo JI.Ryoo BY, et al. Among authors: jung sh.Am J Clin Oncol. 1999 Jun;22(3):253-7. doi: 10.1097/00000421-199906000-00008.Am J Clin Oncol. 1999.PMID: 10362331Clinical Trial.