Using the natural experiment of air pollution declines during the 2008 Beijing Olympics, the researchers evaluated whether having specific months of pregnancy (i.e. 1st…8th) during the 2008 Olympic period was associated with larger birth weights, compared with pregnancies during the same dates in 2007 or 2009.

We explored the association between acute changes in daily mean pulmonary artery (PA) and right ventricular (RV) pressures and concentrations of ambient fine particulate matter [PM with aerodynamic diameter ? 2.5 ?m (PM2.5)] as an explanation for previous associations between congestive heart failure (HF) hospital admissions and PM. In the Chronicle Offers Management to Patients with Advanced Signs and Symptoms of Heart Failure (COMPASS-HF) trial, to see whether management of ambulatory