TY  - RPRT
TI  - Large-database research: complement to randomized trials?
AU  - J A Sacristán
AU  - J Soto
AU  - I Galende
PY  - 1998
DO  - 10.7326/0003-4819-128-10-199805150-00023
UR  - https://pubmed.ncbi.nlm.nih.gov/9599210/
ID  - 9599210
ER  -