This Cochrane Group is no longer active

Due to changes in NIHR funding in evidence synthesis, this Cochrane Group is no longer active. We are so grateful for the work of our contributors.

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Propose a new review title

Please submit proposals to conduct new Cochrane Reviews to Editorial Manager.

Information about how to submit proposals via Editorial Manager is available in Editorial Manager Information for authors.

Please also refer to our Editorial policies and Good practice resources for Cochrane authors pages, for further information and guidance on conducting a Cochrane Review.

Please see the Cochrane Library information for authors for further details.