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Hierarchical clustering (Pearson correlation) of the hybridization signals of genomic DNA fragments within the B. breve marker set for all faecal samples in time‐course order. Signal intensities are indicated by a black‐white colour gradient. On the X‐axis the sample codes are presented (D = day; W = week; M = month). Samples from one infant are highlighted by the bars above the codes as indicated in Fig. 1.
