We expect authors, editors and reviewers to be guided by ethical thinking outlined in the Committee on Publication Ethics or COPE. These guidelines are drawn from COPE's discussions and best practices:

1. Given the nature of our subject matter, we do not encourage jointly-authored papers. If multiple authors are credited, they must each have made substantial contributions to the conception of the paper, its analysis and interpretation of the material considered, and helped draft or the paper and have final approval on the version to be published.

2. Reviewers approached by journal editors should agree to review only if they can be unbiased in their assessment.

3. Reviewers should reveal any competing or conflicting interests should be declared to the editor seeking to commission your review.

4. Reviewers must respect the confidentiality of the peer review process and refrain from using information obtained during the peer review process for their advantage.