Alternative relationships among major Plasmodium lineages resulting from different root placements. The results for the individual likelihood ratio tests are given below each tree. ELW, expected likelihood weights ; AU, approximately unbiased test . T. gondii, C. parvum, T. annulata, and B. bovis were used as an outgroup. Note that only the results from analyses with rate heterogeneity are shown; results from analyses without rate heterogeneity were essentially the same. See also Additional file 4.