Screening for colorectal cancer.
Nelson
J A
JA
D001466:Barium Sulfate; D015179:Colorectal Neoplasms / Q000000981:diagnostic imaging / Q000517:prevention & control*; D004733:Enema; D006801:Humans; D008403:Mass Screening / Q000379:methods*; D011859:Radiography
D001466:Barium Sulfate