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Lee SH, Chai JY, Lee HJ, Hong ST, Yu JR, Sohn WM, Kho WG, Choi MH, Lim YJ.Lee SH, et al. Among authors: yu jr.Am J Trop Med Hyg. 1994 Sep;51(3):281-5. doi: 10.4269/ajtmh.1994.51.281.Am J Trop Med Hyg. 1994.PMID: 7943545