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(Cell Cycle\u00a09, 4579\u20134583; 2010), which reports that miR 449 microRNAs accumulate during mucociliary differentiation of human airway epithelia, was inadvertently omitted from the references list. On pages 1\u20132, the following text has replaced the previous text: \u201cmiR 449a, miR 449b and miR 449c (collectively named miR 449), constitute by far the most strongly induced microRNAs during epithelium differentiation in both species. Although representing less than 0.01% of all microRNA sequences in proliferating HAECs, miR 449 accounted for more than 8% of the microRNA reads in differentiated HAECs (Fig. 1a and Supplementary Fig. S1c,d; see also ref.).\u201d The omitted reference has now been added to the reference list: 13. Liz\u00e9, M., Herr, C., Klimke, A., Bals, R. & Dobbelstein, M. MicroRNA 449a levels increase by several orders of magnitude during mucociliary differentiation of airway epithelia.Cell Cycle\u00a09, 4579\u20134583 (2010). References 13\u201340 have been changed to 14\u201341, respectively.","order":6,"name":"change_details","label":"Change Details","group":{"name":"ArticleHistory","label":"Article History"}},{"value":"The authors declare no competing financial interests.","order":1,"name":"Ethics","group":{"name":"EthicsHeading","label":"Competing interests"}}]}}