Authorship credit should be based only on substantial contributions to each of the three components mentioned below:

1. Concept and design of study or acquisition of data or analysis and interpretation of data;
2. Drafting the article or revising it critically for important intellectual content; and
3. Final approval of the version to be published.

• Participation solely in the acquisition of funding or the collection of data does not justify authorship. 
• General supervision of the research group is not sufficient for authorship. 
• Each contributor should have participated sufficiently in the work to take public responsibility for appropriate portions of the content of the manuscript. 
• The order of naming the contributors should be based on the relative contribution of the contributor towards the study and writing the manuscript. 
• Once submitted the order cannot be changed without written consent of all the contributors. 
• The journal prescribes a maximum number of authors for manuscripts depending upon the type of manuscript, its scope and number of institutions involved. 
• The authors should provide a justification, if the number of authors exceeds these limits.