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Proper KI, Jaarsma E, Robroek SJW, Schram JLD, Boshuizen H, Picavet HSJ, Verschuren WMM, van Oostrom SH.Proper KI, et al.BMC Public Health. 2021 Jul 2;21(1):1300. doi: 10.1186/s12889-021-11350-2.BMC Public Health. 2021.PMID: 34215233Free PMC article.
Groeneveld IF, Proper KI, van der Beek AJ, van Duivenbooden C, van Mechelen W.Groeneveld IF, et al. Among authors: proper ki.BMC Public Health. 2008 Jan 3;8:1. doi: 10.1186/1471-2458-8-1.BMC Public Health. 2008.PMID: 18173844Free PMC article.Clinical Trial.
Strijk JE, Proper KI, van der Beek AJ, van Mechelen W.Strijk JE, et al. Among authors: proper ki.BMC Public Health. 2009 Nov 10;9:408. doi: 10.1186/1471-2458-9-408.BMC Public Health. 2009.PMID: 19903345Free PMC article.Clinical Trial.
Verweij LM, Proper KI, Weel AN, Hulshof CT, van Mechelen W.Verweij LM, et al. Among authors: proper ki.BMC Public Health. 2009 Dec 14;9:461. doi: 10.1186/1471-2458-9-461.BMC Public Health. 2009.PMID: 20003405Free PMC article.Clinical Trial.
Strijk JE, Proper KI, Klaver L, van der Beek AJ, van Mechelen W.Strijk JE, et al. Among authors: proper ki.BMC Public Health. 2010 Nov 9;10:684. doi: 10.1186/1471-2458-10-684.BMC Public Health. 2010.PMID: 21062484Free PMC article.Clinical Trial.
van Berkel J, Proper KI, Boot CR, Bongers PM, van der Beek AJ.van Berkel J, et al. Among authors: proper ki.BMC Public Health. 2011 Sep 27;11:736. doi: 10.1186/1471-2458-11-736.BMC Public Health. 2011.PMID: 21951433Free PMC article.Clinical Trial.
Groeneveld IF, Proper KI, van der Beek AJ, Hildebrandt VH, van Mechelen W.Groeneveld IF, et al. Among authors: proper ki.BMC Public Health. 2011 Oct 31;11:836. doi: 10.1186/1471-2458-11-836.BMC Public Health. 2011.PMID: 22040007Free PMC article.Clinical Trial.
Viester L, Verhagen EA, Proper KI, van Dongen JM, Bongers PM, van der Beek AJ.Viester L, et al. Among authors: proper ki.BMC Public Health. 2012 Jan 30;12:89. doi: 10.1186/1471-2458-12-89.BMC Public Health. 2012.PMID: 22289212Free PMC article.Clinical Trial.
Coffeng JK, Hendriksen IJ, Duijts SF, Proper KI, van Mechelen W, Boot CR.Coffeng JK, et al. Among authors: proper ki.BMC Public Health. 2012 Aug 2;12:592. doi: 10.1186/1471-2458-12-592.BMC Public Health. 2012.PMID: 22852835Free PMC article.Clinical Trial.