TY  - RPRT
TI  - Selection bias and randomized consent designs.
AU  - E Brunner
AU  - R Hilgers
AU  - N Neumann
PY  - 1986
DO  - 10.1016/0021-9681(86)90031-7
UR  - https://pubmed.ncbi.nlm.nih.gov/3949948/
ID  - 3949948
ER  -