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van Beek J, zur Hausen A, Snel SN, Berkhof J, Kranenbarg EK, van de Velde CJ, van den Brule AJ, Middeldorp JM, Meijer CJ, Bloemena E.van Beek J, et al. Among authors: berkhof j.Am J Surg Pathol. 2006 Jan;30(1):59-65. doi: 10.1097/01.pas.0000176428.06629.1e.Am J Surg Pathol. 2006.PMID: 16330943