Edited by Andy Oxman and Stephen Hanney

This series of articles was prepared as part of the SUPPORT project, which was supported by the European Commissions 6th Framework INCO programme, contract 031939. The Norwegian Agency for Development Cooperation (Norad), the Alliance for Health Policy and Systems Research, and the Milbank Memorial Fund funded a peer review meeting where an earlier version of the series was discussed. The Canada Research Chairs Program provides salary support to John Lavis, who has authored several articles in this series, in his role as Chair Canada Research Chair in Knowledge Transfer and Exchange. None of the funders had a role in drafting, revising or approving the content of this series.