TY  - RPRT
TI  - A difficult step in meta-analysis: refining the search.
AU  - Mihai-Sergiu Jalba
PY  - 2003
DO  - 10.1378/chest.123.3.960
UR  - https://pubmed.ncbi.nlm.nih.gov/12628905/
ID  - 12628905
ER  -