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Essink-Bot ML, de Koning HJ, Nijs HG, Kirkels WJ, van der Maas PJ, Schröder FH.Essink-Bot ML, et al. Among authors: kirkels wj.J Natl Cancer Inst. 1998 Jun 17;90(12):925-31. doi: 10.1093/jnci/90.12.925.J Natl Cancer Inst. 1998.PMID: 9637143
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Roobol MJ, Kranse R, Bangma CH, van Leenders AG, Blijenberg BG, van Schaik RH, Kirkels WJ, Otto SJ, van der Kwast TH, de Koning HJ, Schröder FH; ERSPC Rotterdam Study Group.Roobol MJ, et al. Among authors: kirkels wj.Eur Urol. 2013 Oct;64(4):530-9. doi: 10.1016/j.eururo.2013.05.030. Epub 2013 May 25.Eur Urol. 2013.PMID: 23759326Clinical Trial.
van der Aa MN, Steyerberg EW, Sen EF, Zwarthoff EC, Kirkels WJ, van der Kwast TH, Essink-Bot ML.van der Aa MN, et al. Among authors: kirkels wj.BJU Int. 2008 May;101(9):1106-10. doi: 10.1111/j.1464-410X.2007.07224.x. Epub 2007 Sep 20.BJU Int. 2008.PMID: 17888042Clinical Trial.