@article {171, editor = {,}, title = {Once-only flexible sigmoidoscopy screening for colorectal cancer may not reduce colorectal cancer incidence or mortality}, volume = {14}, number = {6}, pages = {171--171}, year = {2009}, doi = {10.1136/ebm.14.6.171}, publisher = {Royal Society of Medicine}, issn = {1356-5524}, URL = {https://ebm.bmj.com/content/14/6/171}, eprint = {https://ebm.bmj.com/content/14/6/171.full.pdf}, journal = {BMJ Evidence-Based Medicine} }