TY  - RPRT
TI  - What are the appropriate controls for a colonoscopic screening program?
AU  - L Herrera
AU  - N J Petrelli
PY  - 1993
DO  - 10.1007/bf02050309
UR  - https://pubmed.ncbi.nlm.nih.gov/8416786/
ID  - 8416786
ER  -