Key points are not available for this paper at this time.
(2008). A Special Issue of JA&WMA Supporting Key Scientific and Policy- and Health-Relevant Findings from EPA’s Particulate Matter Supersites Program and Related Studies: An Integration and Synthesis of Results. Journal of the Air & Waste Management Association: Vol. 58, No. 2, pp. 137-139.
Solomon et al. (Fri,) studied this question.