Fig. 3
From: Molecular epidemiology of hepatitis B virus infection in Norway
Bayesian phylogenetic tree of 1512 HBV S-gene sequences. Letters A–H designate HBV genotype. Tips are coloured according to a broadly defined geographic region where HBV was stated to have been acquired: Green = Africa; Purple = Americas; Red = Asia; Blue = Europe; Grey = Unknown geographical origin. Blue tips with blue circles are sequences of patients infected in Norway. Asterisk (*) indicates posterior probability support of ≥0.95