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Vrijmoet-Wiersma CM, Kooloos VM, Koopman HM, Kolk AM, van der Laan I, Grootenhuis MA, Egeler RM.Vrijmoet-Wiersma CM, et al. Among authors: koopman hm.Pediatr Blood Cancer. 2009 Jan;52(1):116-22. doi: 10.1002/pbc.21740.Pediatr Blood Cancer. 2009.PMID: 18819122