The ICMJE recommends that authorship be based on the following 4 criteria:
In addition to being accountable for the parts of the work he or she has done, an author should be able to identify which co-authors are responsible for specific other parts of the work. In addition, authors should have confidence in the integrity of the contributions of their coauthors. All those designated as authors should meet all four criteria for authorship, and all who meet the four criteria should be identified as authors. Those who do not meet all four criteria should be listed in an Acknowledgements section. Participation solely in the acquisition of funding, the gathering of data, technical help, writing assistance, and general supervision of the research group does not warrant authorship. Financial and material support should also be acknowledged. Please guarantee that anyone stated in the Acknowledgements section has granted its clearance for permission to be listed.
An authorship statement is required for every manuscript submitted and should state who has contributed what to the planning, conduct, and reporting of the work described in the article.
Recognize individuals who provided assistance to the project. Report all sources of grant and other support for the project or study, including funds received from contributors, institutions and commercial sources. Consultancies and funds paid directly to investigators must also be listed.
Any change in authorship (i.e., order, addition, and deletion of authors) after initial submission must be approved by all authors. Authors should determine the order of authorship among themselves. In addition, any alterations must be clarified to the Editor/Editor-in-chief.
A sample of Agreement form of change in Authorship can be found HERE.
A competing interest exists when professional judgment concerning a primary interest (such as patients’ welfare or the validity of research) may be influenced by a secondary interest (such as financial gain - employment, Consultancy, stock ownership or options, honoraria, patents, and paid expert- testimony or personal relationship). There is nothing unethical about a competing interest but it should be acknowledged and clearly stated. All authors must declare all competing interests in their covering letter and in “Competing Interests” section at the end of the manuscript file (before the references). Authors with no competing interests to declare should obviously state that.
The policy of publisher is that none of the editors should have any financial relationship with any Biomedical company.