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1gr3yl0ck2013-04-05T00:00:54+00:00Hunkeler, E.M., Katon, W., Tang, L., Williams, J.W. Jr, Kroenke, K., Lin, E.H., et al (2006). Long term outcomes from the IMPACT randomised trial for depressed elderly patients in primary care. British Medical Journal, 4, 259-63.