Authorship and Copyright


All work must have been approved by all co-authors prior to submission.

Authorship credit should be based on the following criteria: 1) substantial contributions to conception and design, acquisition of data, or analysis and interpretation of data; 2) drafting the article or revising it critically for intellectual content; and 3) final approval of the version to be published.

Multicentre groups: When a multicentre group has conducted the study, all individuals who accept direct responsibility for the manuscript should be identified. When submitting a group author manuscript, the corresponding author should clearly identify all individual authors, as well as the group name.

A conflict of interest statement, author contributions and all funding information should all be included on the title page or in the acknowledgements.


After submission of the article the copyright e-form must be completed online by the submitting author.

In the event of acceptance, the copyright e-form must be submitted online by all authors. The article cannot be published until all authors have submitted their e-forms.