American Thoracic Society [ http://www.thoracic.org ]
An international professional and scientific society for respiratory and critical care medicine.

Canadian Society for Respiratory Therapy [ http://www.csrt.com ]

AZ-Air [ http://www.az-air.com ]
Medical database for respiratory experts featuring information on treatments, symptoms, research, news, and certain asthma medications.

Advance for Respiratory Care Practitioners [ http://www.advanceforrcp.com ]
Offers articles relevant to respiratory care therapists, including clinical advice, news, job listings, and sleep disorder information.