Healthy trees make a healthy wood.
Manuel
Douglas G
DG
The Clinical Epidemiology Program, Ottawa Hospital Research Institute, Room 1-008 Administrative Services Building, 1053 Carling Ave., Ottawa, ONT, Canada K1Y 4E9. dmanuel@ohri.ca
Kwong
Jeffrey C
JC
D006302:Health Services Research / Q000379:methods*; D006801:Humans; D008962:Models, Theoretical; D011634:Public Health; D012107:Research Design; D001335:Vehicle Emissions
D001335:Vehicle Emissions