RT Journal Article SR Electronic T1 More than the tip of the iceberg: health policies and research that go below the surface JF Journal of Epidemiology and Community Health JO J Epidemiol Community Health FD BMJ Publishing Group Ltd SP 957 OP 957 DO 10.1136/jech.2009.091595 VO 63 IS 12 A1 Baum, Fran Elaine YR 2009 UL http://jech.bmj.com/content/63/12/957.abstract AB