Below are some helpful Internet resources on this topic. Mayo Clinic does not own or control any of these sites and is not responsible for their content. Inclusion of these sites does not imply endorsement by Mayo Clinic.
www.healthfinder.gov
Health Finder
www.nlm.nih.gov/medlineplus
MEDLINEplus - National Library of Medicine
www.lungusa.org
American Lung Association
www.cancer.org
American Cancer Society
www.cancer.gov
National Cancer Institute
www.cancer.gov (en Español)
National Cancer Institute