TY  - GEN
AU  - Wiebe,D J
AU  - Branas,C C
TI  - Bias when using dead controls to study handgun purchase as a risk factor for violent death
SN  - 1353-8047
PY  - 2004///0322
KW  - Bias
KW  - Commerce
KW  - statistics & numerical data
KW  - Firearms
KW  - Humans
KW  - Risk Factors
KW  - Violence
KW  - Wounds, Gunshot
KW  - mortality
N1  - Publication Type: Letter; Comment
UR  - https://doi.org/10.1136/ip.9.4.381
ER  -