Correction in a project number in the acknowledgements. Xinxin You, BGI-Shenzhen 9 September 2015 In the acknowledgements, "China 863 project (No. 012AA10A407)" should be "China 863 project (No. 2012AA10A407)". Competing interests The authors declare that they have no competing interests.
Correction in a project number in the acknowledgements.
9 September 2015
In the acknowledgements, "China 863 project (No. 012AA10A407)" should be "China 863 project (No. 2012AA10A407)".Competing interests
The authors declare that they have no competing interests.