AUTHORSHIP & CONTRIBUTORSHIP
Authors should fulfill all four criteria for authorship set by the International Committee of Medical Journal Editors (ICMJE-group at www.icmje.org). This has to be stated in the authorship declaration and should be submitted with the article.
The ICMJE recommends that authorship be based on the following four criteria:
Substantial contributions to the conception or design of the work; or the acquisition, analysis, or interpretation of data for the work; AND
Drafting the work or revising it critically for important intellectual content; AND
Final approval of the version to be published; AND
Agreement 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.
Contributors who meet fewer than all four of the above criteria for authorship should not be listed as authors, but they should be acknowledged. Those whose contributions do not justify authorship may be acknowledged individually or together as a group under a single heading.