From the Centers for Disease Control and Prevention. Trends in screening for colorectal cancer--United States, 1997 and 1999.
D000368:Aged; D003113:Colonoscopy / Q000706:statistics & numerical data*; D015179:Colorectal Neoplasms / Q000517:prevention & control*; D005260:Female; D006801:Humans; D008297:Male; D008403:Mass Screening / Q000639:trends*; D008875:Middle Aged; D009780:Occult Blood; D012812:Sigmoidoscopy / Q000706:statistics & numerical data; D014481:United States / Q000453:epidemiology