RT Journal Article SR Electronic T1 Health impact assessment--theory into practice. JF Journal of Epidemiology and Community Health JO J Epidemiol Community Health FD BMJ Publishing Group Ltd SP 704 OP 705 DO 10.1136/jech.52.11.704 VO 52 IS 11 A1 A Scott-Samuel YR 1998 UL http://jech.bmj.com/content/52/11/704.abstract AB