Screening for colorectal cancer.
Ransohoff
D F
DF
Department of Medicine, Yale University, New Haven, Conn.
Lang
C A
CA
D015179:Colorectal Neoplasms / Q000175:diagnosis / Q000517:prevention & control*; D006801:Humans; D008875:Middle Aged; D009780:Occult Blood; D012812:Sigmoidoscopy