RT Journal Article SR Electronic T1 Understanding and interpreting systematic reviews and meta-analyses. Part 2: meta-analyses JF Evidence Based Mental Health JO Evid Based Ment Health FD BMJ Publishing Group Ltd, Royal College of Psychiatrists and British Psychological Society SP 102 OP 104 DO 10.1136/ebmh.1.4.102 VO 1 IS 4 A1 Freemantle, Nick A1 Geddes, John YR 1998 UL http://ebmh.bmj.com/content/1/4/102.abstract AB