American Association for Thoracic Surgery
www.aats.org

American College of Cardiology
www.acc.org

American College of Surgeons 
www.facs.org

American Heart Association
www.americanheart.org

Anticoagulation Forum
www.acforum.org

Asian Society for Cardiovascular Surgery
www.ascvs.org

British Cardiac Society
www.bcs.com

Canadian Cardiovascular Society
www.ccs.ca

Cardiac Society of Australia and New Zealand
www.csanz.edu.au

Cardiac Surgery Network
www.ctsnet.org

Quality Assured Services
www.ptinr.com