www.ersnet.org
Official site of the European Respiratory Society
www.thoracic.org
Official site of the American Thoracic Society
spirometers.org
Everything there is to know about spirometers
Spirxpert
Site on spirometry by the world-renowned Professor Quanjer
www.asmanet.com
Site on asthma
www.goldcopd.com
Global initiative against COPD