TY  - RPRT
TI  - Control groups appropriate for surgical interventions: ethical and practical issues.
AU  - Morton B Brown
PY  - 2004
DO  - 10.1053/j.gastro.2003.10.041
UR  - https://pubmed.ncbi.nlm.nih.gov/14978655/
ID  - 14978655
ER  -