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Phylogenetic relationships between the 13F1 and 14F1 transmission cluster sequences and public sequences available in the databases. Maximum likelihood (ML) phylogenetic analysis was performed using 13F1 and 14F1 sequences (pink), 4 subtype references (blue), and the 50 most similar sequences obtained in the BLAST query of all publically available sequences. Highlighted in purple are the public sequences that are included in cluster 14F1. The tree was rooted using the M-group consensus.
