An 'author' is generally considered to be someone who has made substantive intellectual contributions to a published study. According to the ICMJE guidelines, to qualify as an author one should have:
- Made substantial contributions to conception and design, or acquisition of data, or analysis and interpretation of data;
- Been involved in drafting the manuscript or revising it critically for important intellectual content;
- Given final approval of the version to be published. Each author should have participated sufficiently in the work to take public responsibility for appropriate portions of the content; and
- Agreed to be accountable for all aspects of the work in ensuring that questions related to the accuracy or integrity of any part of the work are appropriately investigated and resolved.
Changes in authorship
Changes to authorship cannot be made after acceptance of a manuscript. So the authors wishing to make changes to authorship can write a letter to the journal for change of authorship.