Ulitsky, Igor
Article History
First Online: 30 August 2016
Change Date: 6 September 2016
Change Type: Correction
Change Details: In the original version of this article, the sentence “A study using a different background model recently reported more than 4 million regions that are evolving under selection to preserve secondary structure” (section ‘Secondary structure and its conservation’) was missing a citation of reference 65 (Smith, M. A., Gesell, T., Stadler, P. F. & Mattick, J. S. Widespread purifying selection on RNA structure in mammals. <i>Nucleic Acids Res</i>. <b>41</b>, 8220–8236 (2013)). This citation dropped out during journal typesetting of the article and has now been reinstated. The editors apologize for this error.
Competing interests
: The author declares no competing financial interests.