The upper respiratory pyramid: Early factors and later treatment utilization in World Trade Center exposed firefighters

Justin K. Niles, Mayris P. Webber, Xiaoxue Liu, Rachel Zeig-Owens, Charles B. Hall, Hillel W. Cohen, Michelle S. Glaser, Jessica Weakley, Theresa M. Schwartz, Michael D. Weiden, Anna Nolan, Thomas K. Aldrich, Lara Glass, Kerry J. Kelly, David J. Prezant