This journal follow the authorship criteria established by International Committee of Medical Journal Editors and Elsevier. According to the guidelines for authorship established by the International Committee of Medical Journal Editors (ICMJE), "All persons designated as authors should qualify for authorship, and all those who qualify should be listed."
Four criteria must all be met to be credited as an author:
1. Substantial contribution to the study conception and design, data acquisition, analysis, and interpretation
2. Drafting or revising the article for intellectual content.
3. Agreement to be accountable for all aspects of the work related to the accuracy or integrity of any part of the work.
4. Approval of the final version.
Meanwhile, Elsevier ethic in research and publication has provide some general guidelines, which may vary from field to field:
1. The order of authorship should be "a joint decision of the co-authors".
2. Individuals who are involved in a study but don't satisfy the journal's criteria for authorship, should be listed as "Contributors" or "Acknowledged Individuals". Examples include: assisting the research by providing advice, providing research space, departmental oversight, and obtaining financial support.
3. For large, multi-center trials, the list of clinicians and centers is typically published, along with a statement of the individual contributions made. Some groups list authors alphabetically, sometimes with a note to explain that all authors made equal contributions to the study and the publication