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. 2012 Aug;18(8):1268–1273. doi: 10.3201/eid1808.120070

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Genetic network showing the relationship among all hepatitis E virus genotype 3 sequences obtained in this study from isolates from wild rats collected in the United States. Each line represents a single mutational event and closed circles represent extinct or unsampled sequences. Each oval represents a single isolate, and the label corresponds to the tissue number shown in the Technical Appendix and the general sampling locality.