TY  - RPRT
TI  - Selection bias introduced by the informed consent process.
AU  - Nina Hannover Bjarnason
AU  - Jens Peter Kampmann
PY  - 2003
DO  - 10.1016/s0140-6736(03)13568-4
UR  - https://pubmed.ncbi.nlm.nih.gov/12801770/
ID  - 12801770
ER  -