RT Journal Article SR Electronic T1 Assessing Health Need using the Life Cycle Framework JF Journal of Epidemiology and Community Health JO J Epidemiol Community Health FD BMJ Publishing Group Ltd SP 429 OP 429 DO 10.1136/jech.47.5.429-a VO 47 IS 5 A1 Venkat Narayan YR 1993 UL http://jech.bmj.com/content/47/5/429.2.abstract AB