## Table 3 |
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Taxonomic comparison for 3 main bacterial taxa between frozen and RT samples |
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Taxon |
F* |
RT3h* |
RT24h* |
RT2w* |
p value F vs RT3h |
p value F vs RT24h |
p value F vs RT2w |

Bacteroides;uncultured bacterium |
19 | 20 | 19 | 13 | 0.749 | 0.749 | 0.0349 |

Prevotellaceae;uncultured;human gut metagenome | 7 | 6 | 5 | 3 | 0.6804 | 0.3189 | 0.0140 |

Bifidobacterium;uncultured bacterium |
2 | 2 | 3 | 7 | 1 | 0.3964 | 0.0030 |

Statistical analysis was performed using Poisson regression model. * Values are mean
proportion of sequences (%). *p*-value < 0.05 is considered significant; n = 4 subjects; F = frozen; UF1h = unfrozen
during 1 h; UF3h = unfrozen during 3 h; RT = room temperature; 2w = 2 weeks; Taxonomy
is indicated at the genus level and if not possible at the family level.

Cardona * et al.*

Cardona * et al.* *BMC Microbiology* 2012 **12**:158 doi:10.1186/1471-2180-12-158