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The Firmicutes/Bacteroidetes ratio of the human microbiota changes with age

D Mariat*, O Firmesse, F Levenez, VD Guimarăes, H Sokol, J Doré, G Corthier and J-P Furet

BMC Microbiology 2009, 9:123  doi:10.1186/1471-2180-9-123

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