| http://www.w3.org/ns/prov#value | - tion Effects (ESCAPE).The study involved over 100,000 people with no history of heart disease enrolled from 1997 to 2007 and followed for an average of 11.5 years.After taking account of several other risk factors, including other illness, smoking and socioeconomic factors, the researchers found that a 5 g/m3 increase in PM 2.5 levels (fine respirable particles) was associated with a 13 percent in
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