Defining authorship

I often have conversations with my students and colleagues about journal authorship. The International Committee of Medical Journal Editors advice (below) is an updated version of the Vancouver Protocol and is found here: http://www.icmje.org/recommendations/browse/roles-and-responsibilities/

"The ICMJE recommends that authorship be based on the following 4 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."