. Author manuscript; available in PMC: 2014 Jan 1.
Published in final edited form as: Heart Rhythm. 2012 Sep 14;10(1):10.1016/j.hrthm.2012.09.012. doi: 10.1016/j.hrthm.2012.09.012
© 2012 The Heart Rhythm Society. Published by Elsevier Inc. All rights reserved.