Text and Data Mining valid from 2018-05-01
Received: 27 July 2017
Accepted: 26 March 2018
First Online: 2 May 2018
Change Date: 20 June 2018
Change Type: Correction
Change Details: In this Letter, the ‘Open chromatin’ label in Fig. 4a should have been centred above the first three columns, and the black horizontal line underneath the label should have been removed. In addition, there should have been a vertical black line between the last two sets of panels for consistency. Minor changes have also been made to Fig. 1 and to the legend of Fig. 3. These errrors have been corrected online, and see Supplementary Information to the accompanying Amendment for the original Fig. 4.
: The authors declare no competing interests.