TY  - RPRT
TI  - Educational epidemiology.
AU  - Thomas J Beckman
AU  - David A Cook
PY  - 2004
DO  - 10.1001/jama.292.24.2969-a
UR  - https://pubmed.ncbi.nlm.nih.gov/15613651/
ID  - 15613651
ER  -