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Baan CC, Knoop CJ, van Gelder T, Holweg CT, Niesters HG, Smeets TJ, van der Ham F, Zondervan PE, Maat LP, Balk AH, Weimar W.Baan CC, et al. Among authors: balk ah.Transplantation. 1999 Mar 27;67(6):870-6. doi: 10.1097/00007890-199903270-00014.Transplantation. 1999.PMID: 10199736