Flexible sigmoidoscopy may be ineffective for secondary prevention of colorectal cancer in asymptomatic, average-risk men.
Soloway
G
G
Reinus
J F
JF
D015179:Colorectal Neoplasms / Q000453:epidemiology / Q000517:prevention & control*; D006801:Humans; D008297:Male; D008403:Mass Screening; D008875:Middle Aged; D012307:Risk Factors; D012812:Sigmoidoscopy