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The easiest way to add author affiliations is with the authblk package. If you add: \usepackage{authblk} to your preamble, you can then fill in the author and affiliation commands with the information you need, for example: \author[1]{Alice Smith} \author[2]{Bob Jones} \affil[1]{Department of Mathematics, University X} \affil[2]{Department of Biology, University Y} for a paper with two authors.