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Knol, Mirjam J; Egger, Matthias; Scott, Pippa; Geerlings, Mirjam I; Vandenbroucke, Jan P (2009). When one depends on the other: reporting of interaction in case-control and cohort studies. Epidemiology, 20(2), pp. 161-6. Baltimore, Md.: Wolters Kluwer Health, Lippincott Williams & Wilkins 10.1097/EDE.0b013e31818f6651
