RT Journal Article SR Electronic T1 Trends in Coronary Heart Disease Mortality: The Influence of Medical Care JF Journal of Epidemiology and Community Health JO J Epidemiol Community Health FD BMJ Publishing Group Ltd SP 176 OP 176 DO 10.1136/jech.44.2.176 VO 44 IS 2 A1 W C S Smith YR 1990 UL http://jech.bmj.com/content/44/2/176.1.abstract AB