Heart Block

• Banner Heart Hospital — Mesa, Arizona, United States
• USC Medical Center — Los Angeles, California, United States
• University of California, San Francisco — San Francisco, California, United States
• Washington Hospital Center — Washington D.C., District of Columbia, United States

• New York University School of Medicine — New York, United States

• Germans Trias i Pujol University Hospital — Badalona, Barcelona, Spain

• Ziekenhuis Oost Limburg — Genk, Limburg, Belgium

Not specified

• CHU Pontchaillou - CCP — Rennes, France

• Queen Mary Hospital, The University Hospital of Hong Kong — Hong Kong

• Guang Dong General Hospital — Guangzhou, Guangdong, China

• Barzilai Medical Center — Ashkelon, Israel

• Washington University School of Medicine — St Louis, Missouri, United States