title: Bias when using dead controls to study handgun purchase as a risk factor for violent death.
authors.forename: D J
authors.initials: DJ
authors.lastname: Wiebe
authors.forename: C C
authors.initials: CC
authors.lastname: Branas
mesh_terms: D015982:Bias; D003132:Commerce / Q000706:statistics & numerical data; D005389:Firearms / Q000706:statistics & numerical data*; D006801:Humans; D012307:Risk Factors; D014754:Violence / Q000706:statistics & numerical data*; D014948:Wounds, Gunshot / Q000401:mortality*