title: Knowing the previously unknown: identification of a methodological challenge for pharmacoepidemiology.
authors.affiliation: Division of Pharmacoepidemiology and Pharmacoeconomics, Brigham and Women's Hospital, Boston, MA.
authors.forename: Michael A
authors.initials: MA
authors.lastname: Fischer
mesh_terms: D008078:Cholesterol, LDL / Q000187:drug effects*; D016568:Drugs, Generic / Q000008:administration & dosage*; D005260:Female; D006801:Humans; D019161:Hydroxymethylglutaryl-CoA Reductase Inhibitors / Q000008:administration & dosage*; D008297:Male; D008389:Marketing of Health Services / Q000379:methods*; D017891:Pharmacoepidemiology / Q000379:methods*
chemical_list: D008078:Cholesterol, LDL; D016568:Drugs, Generic; D019161:Hydroxymethylglutaryl-CoA Reductase Inhibitors