Where to add acknowledgement in Article I have written an article (2-column type), and would like to put an acknowledgement to acknowledge the non-substantial contribution of a colleague in the analysis of some data.

The structure of the article is

Introduction
Main body
-&gt; chapter with the data
Conclusion
References


Where and how should I put the acknowledgements?
The acknowledgement is usually placed between the conclusion and the references.

You should write a sentence mentioning how the other person or persons contributed to the paper or your work.