Traffic related pollution and heart rate variability in a panel of elderly subjects
J Schwartz, A Litonjua, H Suh, M Verrier, A Zanobetti, M Syring, B Nearing, R Verrier, P Stone, G MacCallum, F E Speizer, D R Gold
Thorax Jun 2005, 60 (6) 455-461; DOI: 10.1136/thx.2004.024836