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The study providers for the Vanguard Study were recruited from Troms County. For the Main Study, providers were recruited from Telemark and Vestfold Counties in the south, and Finnmark and Troms Counties in the north of Norway. This map is obtained from Colorbox. Colorbox is a digital image database, which the entire UiT The Arctic University of Norway, has been granted access to, free of charge. No copyright issue
