. Author manuscript; available in PMC: 2018 Jan 21.
Published in final edited form as: Biochim Biophys Acta Gene Regul Mech. 2017 Jul 20;1860(9):1002–1012. doi: 10.1016/j.bbagrm.2017.07.005
This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/BY-NC-ND/4.0/).