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Figure 1 | Breast Cancer Research

Figure 1

From: Improved breast cancer survival following introduction of an organized mammography screening program among both screened and unscreened women: a population-based cohort study

Figure 1

The staggered implementation of the Norwegian breast cancer screening program in the different groups of counties during the study period. The three study groups are shown in different colours. A = The counties of Rogaland, Oslo, Hordaland, and Akershus; B = Telemark, Agder, Troms, and Finnmark; C = Østfold, Nordland, Buskerud, and Trøndelag; D = Oppland and Møre og Romsdal; E = Sogn og Fjordane and Hedmark; F = Vestfold.

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Breast Cancer Research

ISSN: 1465-542X

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