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de Vries AC, van Grieken NC, Looman CW, Casparie MK, de Vries E, Meijer GA, Kuipers EJ.de Vries AC, et al. Among authors: kuipers ej.Gastroenterology. 2008 Apr;134(4):945-52. doi: 10.1053/j.gastro.2008.01.071. Epub 2008 Jan 30.Gastroenterology. 2008.PMID: 18395075