Phylogeny of four CHIKVs imported into China during 2008. The whole-genome sequences obtained in this study are indicated by black dots. Neighbor-joining trees were constructed using MEGA version 4.0 ; evolutionary distances were computed using the Maximum Composite Likelihood method  and are given as the number of base substitutions per site. All positions containing gaps and missing data were eliminated from the dataset. There were a total of 11594 positions in the final dataset.
Zheng et al. Virology Journal 2010 7:8 doi:10.1186/1743-422X-7-8