Aortic Stenosis, Subvalvular

• Central State Medical Academy — Moscow, Moscow Reg, Russia
• CGMA — Moscow, Russia

• Petrovsky National Research Centre of Surgery — Moscow, Russia

• Zhejiang Province People's Hospital — Hangzhou, Zhejiang, China

• Thomas Hospital — Fairhope, Alabama, United States
• Riverside Medical Center — Kankakee, Illinois, United States
• Johns Hopkins University School of Medicine — Baltimore, Maryland, United States
• University of Michigan Medical Center — Ann Arbor, Michigan, United States

• Mazankowski Alberta Heart Institute — Edmonton, Alberta, Canada
• UBC St. Paul's Hospital — Vancouver, British Columbia, Canada
• Vancouver Island Health Authority — Victoria, British Columbia, Canada
• IWK Health Centre — Halifax, Nova Scotia, Canada

• University of British Columbia/St. Paul's Hospital — Vancouver, British Columbia, Canada

• Göteborg University, Sahlgrenska Universitetssjukhuset — Gothenburg, Sweden

• National Institutes of Health Clinical Center — Bethesda, Maryland, United States

Not specified

Not specified