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Kolkman W, Van de Put MA, Van den Hout WB, Trimbos JB, Jansen FW.Kolkman W, et al. Among authors: jansen fw.Surg Endosc. 2007 Aug;21(8):1363-8. doi: 10.1007/s00464-006-9120-9. Epub 2006 Dec 13.Surg Endosc. 2007.PMID: 17165113