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van der Zwaard BC, Poppe E, Vanwanseele B, van der Horst HE, Elders PJ.van der Zwaard BC, et al.Fam Pract. 2014 Jun;31(3):267-72. doi: 10.1093/fampra/cmt084. Epub 2014 Jan 16.Fam Pract. 2014.PMID: 24435069Clinical Trial.
Suman A, Schaafsma FG, Elders PJ, van Tulder MW, Anema JR.Suman A, et al.BMC Public Health. 2015 May 31;15:522. doi: 10.1186/s12889-015-1876-1.BMC Public Health. 2015.PMID: 26025259Free PMC article.Clinical Trial.
Mast R, Ahmad A, Hoogenboom SC, Cambach W, Elders PJ, Nijpels G, Hugtenburg JG.Mast R, et al.BMC Res Notes. 2015 Nov 4;8:642. doi: 10.1186/s13104-015-1566-1.BMC Res Notes. 2015.PMID: 26536861Free PMC article.