%0 Journal Article %A Kerry, Roger %A Eriksen, Thor Eirik %A Lie, Svein Anders Noer %A Mumford, Stephen D. %A Anjum, Rani Lill %D 2012 %I Wiley %J Journal of Evaluation in Clinical Practice %N 5 %P 1006-1012 %T Causation and evidence-based practive - an ontological review %V 18