TY  - RPRT
TI  - Sigmoidoscopy: case finding versus screening.
AU  - S J Winawer
AU  - J F Kerner
PY  - 1988
DO  - 10.1016/0016-5085(88)90515-x
UR  - https://pubmed.ncbi.nlm.nih.gov/3292343/
ID  - 3292343
ER  -