PNAS

Proceedings of the National Academy of Science of the United States of America

If manuscript files have been submitted to the Article Sizing Tool and authors would like to generate a new estimate PDF with modified files or information, enter the Locator ID found in the PDF email and click 'Change Existing Length Estimate' to retrieve previous estimate submission.

Change Existing Length Estimate

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If you have any problems submitting your length estimate or if you have any questions about the generated PDF, please contact PNASProcessing@nas.edu.

Please include a copy of all manuscript files. Please note that our email servers automatically delete .zip files; the files should be sent individually.

If you have any questions about the PNAS submission requirements, please contact the Editorial Office at pnas@nas.edu.