FIG. 1.

(A) Phylogenetic tree of 49 isolates of HPV-44 and its subtype HPV-55, which has been originally misclassified as an independent type and therefore numbered differently. The samples came from five cohorts of patients living in Sao Paulo, Brazil (BR), Hong Kong (HK), Monterrey, Mexico (MX), Cape Town, South Africa (SA), and Oklahoma City, Oklahoma (OK). The numerical codes following these abbreviations correlate to patients, whose identities remained unknown to the principal investigators of this study. The major phylogenetic tree was generated by the UPGMA (unweighted pair group method with arithmetic average) algorithm. The small inset was calculated by the neighbor-joining method and included in this figure to increase the visual impact of a star phylogeny as opposed to evolution by deep dichotomic branching.