Ventricular Outflow Obstruction

• Research site — Calgary, Alberta, Canada
• Research site — Edmonton, Alberta, Canada
• Research site — Surrey, British Columbia, Canada
• Research site — Vancouver, British Columbia, Canada

• Clin. Dept. of Cardiothoracic and Vascular Anaesthesia & Intensive Medicine, Medical University of Vienna, Vienna General Hospital — Vienna, State of Vienna, Austria

• CHU Caen, cardiology department — Caen, France

• Faculty hospital Královské Vinohrady — Prague, Czechia

• Medizinische Hochschule Hannover — Hanover, Lower Saxony, Germany
• Herz-und Diabeteszentrum NRW — Bad Oeynhausen, North Rhine-Westphalia, Germany
• Deutsches Kinderherzzentrum — Sankt Augustin, North Rhine-Westphalia, Germany
• Universitätsklinikum des Saarlandes — Homburg, Saarland, Germany

• Hospital Pedro Hispano — Porto, Portugal

Not specified

Not specified

• Magdy Yacoub heart center — Aswān, Egypt
• Ain shams Specialized hospital — Cairo, Egypt
• Badr hospital — Cairo, Egypt
• American University of Beirut — Beirut, Lebanon

• Cedars-Sinai Medical Center — Los Angeles, California, United States
• Los Robles Regional Medical Center — Thousand Oaks, California, United States
• Washington Hospital Center — Washington D.C., District of Columbia, United States
• Advocate Christ Medical Center — Oak Lawn, Illinois, United States