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van der Ven NC, Lubach CH, Hogenelst MH, van Iperen A, Tromp-Wever AM, Vriend A, van der Ploeg HM, Heine RJ, Snoek FJ.van der Ven NC, et al. Among authors: lubach ch.Patient Educ Couns. 2005 Mar;56(3):313-22. doi: 10.1016/j.pec.2004.03.005.Patient Educ Couns. 2005.PMID: 15721974Clinical Trial.