TY  - RPRT
TI  - Screening flexible sigmoidoscopy: effectiveness is not enough.
AU  - R H Fletcher
AU  - F A Farraye
PY  - 1999
DO  - 10.1053/gast.1999.0029900486
UR  - https://pubmed.ncbi.nlm.nih.gov/10419930/
ID  - 10419930
ER  -