Editors: Denise O’Connor, Sally Green and Julian PT Higgins.
This chapter should be cited as: O’Connor D, Green S, Higgins JPT (editors). Chapter 5: Defining the review question and developing criteria for including studies. In: Higgins JPT, Green S (editors), Cochrane Handbook of Systematic Reviews of Intervention. Version 5.0.0 (updated February 2008). The Cochrane Collaboration, 2008. Available from www.cochrane-handbook.org.
Acknowledgements: This section builds on earlier versions of the Handbook. For details of previous authors and editors of the Handbook, see Chapter 1 (Section 1.4).