TY  - RPRT
TI  - [What is a confounding variable?].
AU  - J de Irala
AU  - M A Martínez-González
AU  - F Guillén Grima
PY  - 2001
DO  - 10.1016/s0025-7753(01)72121-5
UR  - https://pubmed.ncbi.nlm.nih.gov/11602158/
ID  - 11602158
ER  -