From 2003 to 2005 , we measured personal fine particle ( particulate matter with aerodynamic diameter < 2.5 microm ; PM ( 2.5 ) ) exposures and systolic ( SBP ) and diastolic blood pressure ( DBP ) among women > 38 years of age from the chimney woodstove intervention group ( 49 subjects ) and traditional open wood fire control group ( 71 subjects ) .
