From the Department of Environmental Science and Physiology, Harvard School of Public Health, and the Channing Laboratory, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts.
Requests for reprints should be addressed to Dr. D. W. Dockery, Department of Environmental Science and Physiology, Harvard School of Public Health, 665 Huntington Avenue, Boston, MA
Read More: http://www.atsjournals.org/doi/abs/10.1164/ajrccm/139.3.587#.VMYusvnoSpc