TY  - RPRT
TI  - [Efficacy assessment with random assignment using data bases: medicine-based evidence?].
AU  - J A Sacristán
AU  - J Soto
AU  - I Galende
PY  - 1998
UR  - https://pubmed.ncbi.nlm.nih.gov/9881337/
ID  - 9881337
ER  -