. Author manuscript; available in PMC: 2018 Aug 3.
Published in final edited form as: JACC Clin Electrophysiol. 2018 Feb 2;4(4):504–514. doi: 10.1016/j.jacep.2017.12.003
This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).