Cochrane Reviews must remain free for dissemination in any and all media, without restriction from any of them. To ensure this, Cochrane reviewers grant the Collaboration world-wide licences for these activities, and do not sign over exclusive copyright to any journal or other publisher. This applies particularly to Centre directors and editors of Review Groups. However, journals will sometimes insist that the publication of the review in CDSR should not precede publication in print. Publication in print should not be subject to lengthy production times, and reviewers should not unduly delay publication of a Cochrane Review either because of delays from a journal or in order to resubmit their review to another journal.
Journals can also request revision of a review for editorial or content reasons.
External peer review provided by journals may enhance the value of the review and should be welcomed. A similar statement should be included in the introduction if a review is published in CDSR prior to publishing a version of the review in a journal. After a version of a Cochrane Review has been published in a journal, a reference to the journal publication must be added under the heading 'Other published versions of this review'. A version of this review has been published in The Cochrane Library . Cochrane systematic reviews are regularly updated to include new research, and in response to comments and criticisms from readers.