Figure 1
![Figure 1](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2F1471-2334-11-337/MediaObjects/12879_2011_Article_1678_Fig1_HTML.jpg)
Map of Turkey according to regions, population size per region and the number of estimated CHB cases. Map of Turkey according to regions; 1: Marmara region, 2: Aegean region, 3: Black Sea region, 4: Inner Anatolia region, 5: Mediterranean region, 6: Eastern Anatolia region, 7: south-eastern Anatolia region. Regions with similar socioeconomic status and HBsAg seroprevalence are grouped as A (1 and 2), B (3, 4 and 5) and C (6 and 7).