Fig. 5

Pie charts of the relative abundance of the top 10 species in the two groups (EBF: before metformin treatment; EAF: after metformin treatment) at the phylum (A: EBF; B: EAF), class (C: EBF, D: EAF), order (E: EBF, F: EAF), family (G: EBF, H: EAF), genus (I: EBF, J: EAF) and species (K: EBF, L: EAF) levels