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Phylogenetic tree based on the VP4/VP2nucleotide sequences. The sequences from patients with HRV-PI and HRV-AI are respectively reported with black and white circles. The sampling time from the first positive sample is reported in brackets for each patient sequence series. The HRV reference strains are reported with the accession number. The closest related HRV prototype for each patient series is reported in bold. The scale shows the evolutionary distance.
