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van der Wal MF, van den Boom DC, Pauw-Plomp H, de Jonge GA.van der Wal MF, et al. Among authors: van den boom dc.Arch Dis Child. 1998 Oct;79(4):312-7. doi: 10.1136/adc.79.4.312.Arch Dis Child. 1998.PMID: 9875040Free PMC article.
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