Fig. 3
From: Molecular epidemiology of hepatitis B virus infection in Switzerland: a retrospective cohort study
Dendogram of Hepatitis B virus in Swiss residents. Region of origin is illustrated by different colours: Swiss (blue), Asian (purple), European/Mediterranean (EuMed, red), sub Saharan African (ssAfr, green), unknown or other (Unkn/Oth, turquois), reference sequences (REFsequ, black). Each sample is labelled with Genotype_GenBank accession number_region of origin/country code. The country codes are provided in the supplemental material (Additional file 1: Table S2). *The bar length indicates the distance of a 1 nucleotide (nt) polymorphism. The number in the tree indicates the bootstrap reliability