The New England Journal of Medicine Downloaded from nejm.org at Univ of Florida Health Science Lib on November 13, 2015. For personal use only. No other uses without permission. Copyright © 1992 Massachusetts Medical Society. All rights reserved.

The New England Journal of Medicine Downloaded from nejm.org at Univ of Florida Health Science Lib on November 13, 2015. For personal use only. No other uses without permission. Copyright © 1992 Massachusetts Medical Society. All rights reserved.

The New England Journal of Medicine Downloaded from nejm.org at Univ of Florida Health Science Lib on November 13, 2015. For personal use only. No other uses without permission. Copyright © 1992 Massachusetts Medical Society. All rights reserved.

Screening sigmoidoscopy for colorectal cancer.

The New England Journal of Medicine Downloaded from nejm.org at Univ of Florida Health Science Lib on November 13, 2015. For personal use only. No oth...
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