Arrhythmias, Cardiac

• Karolinska Institutet Danderyd University Hospital — Stockholm, Outside US, Sweden
• Halland Hospital Varberg — Varberg, Outside US, Sweden

• Banner University Medical Center — Phoenix, Arizona, United States
• Sutter Health/Palo Alto Medical Foundation — Burlingame, California, United States
• Santa Barbara Cottage Hospital — Santa Barbara, California, United States
• UCHealth Medical Center of the Rockies — Loveland, Colorado, United States

• University Medicine Greifswald — Greifswald, Mecklenburg-Vorpommern, Germany
• Ambulantes Herz-Kreislauf-Zentrum — Pasewalk, Germany
• Asklepeion Hospital — Athens, Attica, Greece
• Semmelweis University - Heart and Vascular Center — Budapest, Hungary

• Alingås Hospital — Alingsås, Sweden
• Enköping Hospital — Enköping, Sweden
• Mälarsjukhuset Hospital — Eskilstuna, Sweden
• Falu Hospital — Falun, Sweden

• Lucy Hwozdyk — Haverfordwest, Pembrokeshire, United Kingdom

Not specified

• Imelda — Bonheiden, Belgium
• OLVG — Amsterdam, Netherlands
• Deventer Ziekenhuis — Deventer, Netherlands
• Admiraal De Ruyter Ziekenhuis — Goes, Netherlands

• University of Alabama — Birmingham, Alabama, United States
• William Beaumont Hospital — Royal Oak, Michigan, United States
• Antwerp University Hospital — Antwerp, Belgium

• The University of Oklahoma Health Sciences Center — Oklahoma City, Oklahoma, United States

• The Affiliated Hospital of Xuzhou Medical University — Xuzhou, Jiangsu, China