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. 2016 Sep 8;6(9):e011444. doi: 10.1136/bmjopen-2016-011444

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Map of Iceland and study areas (as defined in Carlsen et al⁵). Inserted map of Iceland in the right corner shows the location of Skagafjörður in Northern Iceland (non-exposed area) and the exposed area in South Iceland. The larger map shows the exposed area with Eyjafjallajökull marked as X, the site of the measuring station with a Δ and the exposed areas divided into low, medium and high exposed areas.