%0 Journal Article %A Derrick A Bennett %A Jonathan R Emberson %T Stratification for exploring heterogeneity in systematic reviews %D 2009 %R 10.1136/ebm.14.6.162-a %J Evidence Based Medicine %P 162-164 %V 14 %N 6 %U https://ebm.bmj.com/content/ebmed/14/6/162.2.full.pdf