@article{8332a99d503f4599ba6a5c52051e1117,
title = "Effects of fine and ultrafine particles on cardiorespiratory symptoms in elderly subjects with coronary heart disease: The ULTRA study",
keywords = "Diergeneeskunde (DGNK)",
author = "\{de Hartog\}, J.J. and G. Hoek and A. Peters and K.L. Timonen and A. Ibald-Mulli and B. Brunekreef and J. Heinrich and P. Tittanen and \{van Wijnen\}, J.H. and W.G. Kreyling and M. Kulmala and J. Pekkanen",
year = "2003",
language = "Undefined/Unknown",
volume = "157",
pages = "613--623",
journal = "American Journal of Epidemiology",
issn = "0002-9262",
publisher = "Oxford University Press",
}