| American Lung Association |
|
http://www.lungusa.org |
International |
| European Respiratory Society ( ERS ) |
ERS |
http://www.ersnet.org |
International |
| European Society of Cardiology |
ESC |
http://www.escardio.org |
International |
| Cardiac Society Australia and New Zealand |
|
http://www.csanz.edu.au |
|
| National Library of Medicine |
|
http://www.nlm.nih.gov/about/index.html |
International |
| Wikipedia, the free encyclopedia |
|
http://wikipedia.org |
International |
World Health Organization
Library & Information Networks for Knowledge |
WHO/OMS |
http://www.who.int/library |
International |
