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Kuhlmann K, de Castro S, van Heek T, Busch O, van Gulik T, Obertop H, Gouma D.Kuhlmann K, et al. Among authors: obertop h.Surgery. 2006 Feb;139(2):188-96. doi: 10.1016/j.surg.2005.06.034.Surgery. 2006.PMID: 16455327
van Sandick JW, van Lanschot JJ, ten Kate FJ, Tijssen JG, Obertop H.van Sandick JW, et al. Among authors: obertop h.J Am Coll Surg. 2002 Jan;194(1):28-36. doi: 10.1016/s1072-7515(01)01119-x.J Am Coll Surg. 2002.PMID: 11803954