Trends in respiratory symptoms of firefighters exposed to the world trade center disaster: 2001-2005.
Webber MP, Gustave J, Lee R, Niles JK, Kelly K, Cohen HW, Prezant DJ.
Environ Health Perspect. 2009 Jun; 117(6):975-80. Epub 2009 Feb 11.
[Environ Health Perspect. 2009]