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Schoonen M, Wildschut H, Essink-Bot ML, Peters I, Steegers E, de Koning H.Schoonen M, et al.Patient Educ Couns. 2012 Jun;87(3):351-9. doi: 10.1016/j.pec.2011.10.001. Epub 2011 Oct 24.Patient Educ Couns. 2012.PMID: 22030253