Arrhythmias, Cardiac

• Teknon Medical Center — Barcelona, Spain

• Hamilton General Hospital — Hamilton, Ontario, Canada

• Inova Fairfax Hospital — Falls Church, Virginia, United States

• Department of Cardiology, Medical University of Bialystok, Bialystok, Poland — Bialystok, Poland
• Medical Univeristy of Bialystok — Bialystok, Poland
• Department of Cardiology and Internal Medicine, Medical University of Gdansk, Gdynia, Poland — Gdansk, Poland
• Department of Internal diseases, I.M.Sechenov First Moscow State Medical University, Moscow, Russian Federation — Moscow, Russia

• Institut de Cardiologie - Hôpital Pitié-Salpêtrière — Paris, France

• Felipe Atienza Fernandez — Madrid, Spain

• Cleveland Clinic Foundation — Cleveland, Ohio, United States

• Pronto Socorro Cardiológico de Pernambuco - Procape — Recife, Pernambuco, Brazil
• Instituto de Medicina Integral Prof Fernando Figueira - Imip — Recife, Pernambuco, Brazil
• INCOR - Instituto do Coração da Faculdade de Medicina da Universidade de São Paulo — São Paulo, Brazil

Not specified

• Los Angeles Biomedical Research Institute at Harbor-UCLA Medical Center — Torrance, California, United States
• Bayfront Health St Petersburg — St. Petersburg, Florida, United States
• Tampa General Hospital — Tampa, Florida, United States
• University of South Florida — Tampa, Florida, United States