Evaluation of a method to indirectly adjust for unmeasured covariates in the association between fine particulate matter and mortality

Anders C. Erickson, Michael Brauer, Tanya Christidis, Lauren Pinault, Daniel L. Crouse, Aaron van Donkelaar, Scott Weichenthal, Amanda Pappin, Michael Tjepkema, Randall V. Martin, Jeffrey R. Brook, Perry Hystad, Richard T. Burnett