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3. The Swedish Social Insurance Agency (2002) RFV Analyserar 2002:4. Långtidssjukrivningar för psykisk sjukdom och utbrändhet. -Vilka egenskaper och förhållanden är utmärkanden för de drabbade? (Long-term sick leaves for psychiatric disorders and burnout.What properties and conditions are distinguishing for the affected.) (In Swedish) Försäkringskassan, Stockholm.
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5. Diagnosis-specific sickness absence as a predictor of mortality: the Whitehall II prospective cohort study;J Head;BMJ,2008