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Holseter, C., Dalen, J. D., Krokstad, S., & Eikemo, T. A. (2015). Self-rated health and mortality in different occupational classes and income groups in Nord-Trondelag County, Norway. Tidsskr Nor Laegeforen, 135(5), 434–438.
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Langhammer, A., Krokstad, S., Romundstad, P., Heggland, J., & Holmen, J. (2012). The HUNT study: participation is associated with survival and depends on socioeconomic status, diseases and symptoms. BMC Med Res Methodol, 12, 143.
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