RT Journal Article SR Electronic T1 Effectiveness of primary health care evaluated by a longitudinal ecological approach JF Journal of Epidemiology and Community Health JO J Epidemiol Community Health FD BMJ Publishing Group Ltd SP 3 OP 4 DO 10.1136/jech.2005.042416 VO 60 IS 1 A1 Stein, Airton T A1 Harzheim, Erno YR 2006 UL http://jech.bmj.com/content/60/1/3.abstract AB