RT Journal Article SR Electronic T1 Cancer Wars: How politics shapes what we know and don't know about cancer JF Journal of Epidemiology and Community Health JO J Epidemiol Community Health FD BMJ Publishing Group Ltd SP 468 OP 468 DO 10.1136/jech.51.4.468-a VO 51 IS 4 A1 Shaun Murphy YR 1997 UL http://jech.bmj.com/content/51/4/468.2.abstract AB