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de Graaf EJ, Burger JW, van Ijsseldijk AL, Tetteroo GW, Dawson I, Hop WC.de Graaf EJ, et al. Among authors: hop wc.Colorectal Dis. 2011 Jul;13(7):762-7. doi: 10.1111/j.1463-1318.2010.02269.x. Epub 2010 Mar 23.Colorectal Dis. 2011.PMID: 20345967
Doornebosch PG, Bronkhorst PJ, Hop WC, Bode WA, Sing AK, de Graaf EJ.Doornebosch PG, et al. Among authors: hop wc.Dis Colon Rectum. 2008 Jan;51(1):38-42. doi: 10.1007/s10350-007-9104-4. Epub 2007 Nov 21.Dis Colon Rectum. 2008.PMID: 18038181
van Veen RN, Mahabier C, Dawson I, Hop WC, Kok NF, Lange JF, Jeekel J.van Veen RN, et al. Among authors: hop wc.Ann Surg. 2008 Mar;247(3):428-33. doi: 10.1097/SLA.0b013e318165b0ff.Ann Surg. 2008.PMID: 18376185Clinical Trial.