RT Journal Article SR Electronic T1 Snow V. Screening for diseases: prevention in primary care. Philadelphia: American College of Physicians, 2004. ISBN 1-930513-56-9 JF Evidence Based Medicine JO Evid Based Med FD BMJ Publishing Group Ltd SP 189 OP 189 DO 10.1136/ebm.9.6.189 VO 9 IS 6 A1 Frank Sullivan YR 2004 UL http://ebm.bmj.com/content/9/6/189.abstract AB