American Thoracic Society (ATS) http://www.thoracic.org

European Respiratory Society (ERS) http://www.ersnet.org/

European Society of Cardiology (ESC) http://www.escardio.org/

The American College of Chest Physicians http://www.chestnet.org/

American Heart Association http://www.americanheart.org/

International Association for Adult Congenital Cardiac Disease http://www.isaccd.org

International Society for Heart and Lung Transplantation http://www.ishlt.org

The European League Against Rheumatism (EULAR) http://www.eular.org/

American College of Rheumatology http://www.rheumatology.org/

HIV Medicine http://www.hivmedicine.com/