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van Hoogstraten HJ, Vleggaar FP, Boland GJ, van Steenbergen W, Griffioen P, Hop WC, van Hattum J, van Berge Henegouwen GP, Schalm SW, van Buuren HR.van Hoogstraten HJ, et al. Among authors: hop wc.Am J Gastroenterol. 2000 Aug;95(8):2015-22. doi: 10.1111/j.1572-0241.2000.02267.x.Am J Gastroenterol. 2000.PMID: 10950051Clinical Trial.
de Jongh FE, Janssen HL, de Man RA, Hop WC, Schalm SW, van Blankenstein M.de Jongh FE, et al. Among authors: hop wc.Gastroenterology. 1992 Nov;103(5):1630-5. doi: 10.1016/0016-5085(92)91188-a.Gastroenterology. 1992.PMID: 1426884
Ginai AZ, van Buuren HR, Hop WC, Schalm SW.Ginai AZ, et al. Among authors: hop wc.Br J Radiol. 1993 Apr;66(784):322-6. doi: 10.1259/0007-1285-66-784-322.Br J Radiol. 1993.PMID: 8495286
Wolfhagen FH, van Buuren HR, den Ouden JW, Hop WC, van Leeuwen JP, Schalm SW, Pols HA.Wolfhagen FH, et al. Among authors: hop wc.J Hepatol. 1997 Feb;26(2):325-30. doi: 10.1016/s0168-8278(97)80048-7.J Hepatol. 1997.PMID: 9059953Clinical Trial.
Wolfhagen FH, Sternieri E, Hop WC, Vitale G, Bertolotti M, Van Buuren HR.Wolfhagen FH, et al. Among authors: hop wc.Gastroenterology. 1997 Oct;113(4):1264-9. doi: 10.1053/gast.1997.v113.pm9322521.Gastroenterology. 1997.PMID: 9322521Free article.Clinical Trial.