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Thompson M, Harnden A, Perera R, Mayon-White R, Smith L, McLeod D, Mant D.Thompson M, et al. Among authors: perera r.Arch Dis Child. 2009 May;94(5):361-5. doi: 10.1136/adc.2008.145011. Epub 2008 Nov 19.Arch Dis Child. 2009.PMID: 19019883