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To initiate this process, authors should first contact the relevant Managing Editor of the CRG for permission (using the 'Permission to co-publish' form (Permission to co-publish). The CRG will refer each case to the Cochrane Editorial and & Methods Department (contact emd@cochrane.org and ensure that the subject line of your email clearly states "Co-publication query). The authors, the CRG and the journal will all be required to follow the steps outlined in the section Co-publication process.