What evidence do we have on implementation? Or : It might work in a trial but how do we make it work round here?

Popay, Jennie and Roberts, H. and Arai, L. and Roen, K. (2006) What evidence do we have on implementation? Or : It might work in a trial but how do we make it work round here? In: Health development agency : evidence at the croassroads : new directions in changing the health of the public : a manual. :. Oxford University Press, Oxford.