Figure 4From: Avian influenza virus monitoring in wintering waterbirds in Iran, 2003-2007Phylogenetic tree for the full length hemagglutinin gene of H9N2 influenza viruses. The tree constructed by Neighbour-joining method. Sequences obtained in this study were labelled by red (2003 virus) and green dots (2007 viruses). The other sequences were selected from GenBank. The numbers represent bootstrap values which were determined using 1000 replications.Back to article page