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The letter by Rossi et al that was published in the November 2008 issue of the journal (Rossi E, Messa J, Zuffardi O. Ring syndrome: still true? J Med Genet 2008;45:766–8) should have been published in the same issue as the letter to which it was responding (Zollino M, Murdolo M, Neri G. The terminal 760 kb region on 4p16 is unlikely to be the critical interval for growth delay in Wolf–Hirschhorn syndrome. J Med Genet 2008;45:544). The journal apologises for this error.
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