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dos Santos JI, Morgado MG, Galvão-Castro B.dos Santos JI, et al. Among authors: morgado mg.Am J Trop Med Hyg. 1987 Sep;37(2):263-70. doi: 10.4269/ajtmh.1987.37.263.Am J Trop Med Hyg. 1987.PMID: 2444121