All manuscript files, including the cover letter. In virtually all cases, referee comments to the author for this and all previous versions of the manuscript, but only if the manuscript was peer ...

Authors should provide a cover letter that explains 'in their words' why the new work should be published in a top-tier journal. Often we receive manuscripts submitted with a brief cover letter ...

and statistical review processes to evaluate manuscripts for scientific accuracy, novelty, and importance. Step 2: Prepare materials for submission including cover letter (optional), main text ...