[1] Hartford Hospital, Hartford, CT
[2] University of Michigan, Ann Arbor, MI
[3] University Hospital Rangueil, Toulouse
[4] Institute for Clinical and Experimental Medicine, Prague
[5] Jiangsu Province Hospital, The First Affiliated Hospital, Nanjing Medical University, Nanjing
[6] Sree Chitra Institute for Medical Sciences and Technology, Thiruvananthapuram
[7] Centro Privado de Cardiologia, Tucuman
[8] Instituto Brasilia de Arritmia, Brasilia
[9] Duke University Medical Center, Durham, NC
[10] Beth Israel Deaconess Medical Center, Boston, MA
[11] Heart Institute, Teknon Medical Center, Barcelona
[12] University of Pennsylvania, Philadelphia, PA
[13] Cleveland Clinic, Cleveland, OH
[14] Washington University, School of Medicine, St. Louis, MO
[15] Hospital Cardiologico SOS Cardio, Florianopolis
[16] Northwestern University, Feinberg School of Medicine, Chicago, IL
[17] Ospedale San Raffaele, Milan
[18] Herz- und Gefäß- Klinik, Bad Neustadt
[19] University of Maryland, Baltimore, MD
[20] Hospital General de Agudos Cosme Argerich, Buenos Aires
[21] University of Queensland, The Prince Charles Hospital, Chermside
[22] University of Alabama at Birmingham, Birmingham, AL
[23] Indiana University, School of Medicine, Krannert Institute of Cardiology, Indianapolis, IN
[24] University of Tsukuba, Ibaraki
[25] University of California San Francisco, Benioff Children's Hospital, San Francisco, CA
[26] Australian National University, Canberra Hospital, Canberra
[27] CardioInfantil Foundation, Cardiac Institute, Bogota
[28] Queen Elizabeth II Health Sciences Centre, Halifax
[29] University Hospital Antwerp, University of Antwerp, Antwerp
[30] Kyorin University, School of Medicine, Tokyo
[31] Vanderbilt University Heart and Vascular Center, Nashville, TN
[32] Brigham and Women's Hospital, Boston, MA
[33] University of Colorado Denver, Aurora, CO
[34] Leiden University Medical Center, Leiden