Universal background checks for handgun purchases can reduce African American homicide rates - Kaufman, EJ; Morrison, CN; Olson, EJ; Humphreys, DK; Wiebe, DJ; Martin, ND; Sims, CA; Hoofnagle, MH; Schwab, CW; Reilly, PM; Seamon, MJ (Journal of Trauma and Acute Care Surgery, 2020)