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Kruijff S, Bastiaannet E, Francken AB, Schaapveld M, van der Aa M, Hoekstra HJ.Kruijff S, et al. Among authors: hoekstra hj.Br J Cancer. 2012 Jul 24;107(3):570-4. doi: 10.1038/bjc.2012.255. Epub 2012 Jun 19.Br J Cancer. 2012.PMID: 22713665Free PMC article.
Koopal SA, Tiebosch AT, Albertus Piers D, Plukker JT, Schraffordt Koops H, Hoekstra HJ.Koopal SA, et al. Among authors: hoekstra hj.Cancer. 2000 Oct 15;89(8):1720-5.Cancer. 2000.PMID: 11042566