American College of Cardiology [http://www.acc.org] American Heart Association [http://www.americanheart.org] The Society of Thoracic Surgeons [http://sts.org/] The American Association for Thoracic Surgery [http://WWW.aats.org/] European Heart Journal [http://www.eurheartj.org/] European Society of Cardiology [http://www.escardio.org/] The World hypertension League [http://www.mco.edu/org/whl/]