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http://www.ncbi.nlm.nih.gov/pubmed/21192848
http://www.ncbi.nlm.nih.gov/pubmed/21192848 3Crump et al. 2004. The global burden of typhoid fever. Bulletin World Health Organization 82: 346--353.
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http://www.ncbi.nlm.nih.gov/pubmed/21192848
http://www.ncbi.nlm.nih.gov/pubmed/21192848 3Crump et al. 2004. The global burden of typhoid fever. Bulletin World Health Organization 82: 346--353.
...