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- http://wwwnc.cdc.gov/eid/article/19/6/12-1351_article.htm
- http://www.thelancet.com/journals/laninf/article/PIIS1473-3099%2813%2970124-5/abstract
- http://aac.asm.org/content/56/10/5096.full
- http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2747853/
- http://www.ncbi.nlm.nih.gov/nuccore/AY463797
- http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1797678/
- http://www.biomedcentral.com/1471-2164/12/425/abstract
- http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3175032/