TY  - RPRT
TI  - A simple and valid tool distinguished efficacy from effectiveness studies.
AU  - Gerald Gartlehner
AU  - Richard A Hansen
AU  - Daniel Nissman
AU  - Kathleen N Lohr
AU  - Timothy S Carey
PY  - 2006
DO  - 10.1016/j.jclinepi.2006.01.011
UR  - https://pubmed.ncbi.nlm.nih.gov/16980143/
ID  - 16980143
ER  -