From the Centers for Disease Control and Prevention. Screening for colorectal cancer--United States, 1997.
D000368:Aged; D015179:Colorectal Neoplasms / Q000517:prevention & control*; D005260:Female; D006801:Humans; D008297:Male; D008403:Mass Screening / Q000706:statistics & numerical data*; D008875:Middle Aged; D011159:Population Surveillance; D014481:United States / Q000453:epidemiology