PNAS Plus
In January 2011, PNAS started considering manuscripts for exclusive online publication, "PNAS Plus" papers. These have a larger maximum page limit (10 rather than 6 pages). Accompanying these papers both online and in print was a one- to two-page summary description written by the authors for a broad readership. Since mid-October 2012, PNAS Plus authors no longer need to submit author summaries and are instead asked to submit a 100-word-maximum statement about the significance of their paper. The significance statement will appear both online and in print.
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