RT Journal Article SR Electronic T1 Health benefits of green spaces not confirmed JF Journal of Epidemiology and Community Health JO J Epidemiol Community Health FD BMJ Publishing Group Ltd SP 312 OP 312 DO 10.1136/jech.57.4.312 VO 57 IS 4 A1 J Adams A1 M White YR 2003 UL http://jech.bmj.com/content/57/4/312.1.abstract AB