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This collaborative document has been created for the panel discussion on "Rotation in massive stars" (\href{http://www.physics.ncsu.edu/FOE2015/}{FOE 2015}). All conference participants have been added to the document and can edit / \href{https://www.authorea.com/users/9932/articles/13560/_show_article}{comment} / add figures (just drag\&drop) / \href{https://www.authorea.com/users/9932/articles/12628/_show_article}{references} and even LaTeX equations if needed. needed (check the \href{https://www.authorea.com/help}{help page} for more infos on how to edit the document).  Hopefully this will capture the essential ideas and interactions that will stem during and after the discussion. The document can be forked at any time, so that particular discussions can be taken further and potentially lead to active collaborations.