Dear [CORRESPONDING AUTHOR]:
The above published manuscript appears to contain substantial overlap with the previously published manuscript [title and full citation]. Specifically, [specify overlap here –figures, text, or tables].
Republishing material from a previous publication without proper attribution in another original research article is not an acceptable practice. In more serious departures from scientific standards we may contact institutional officers and granting agencies and/or consider publishing a notice of concern or even retracting the paper. At this point, it is unclear whether this duplication of data reaches that level of concern. Our journal does, however, require an explanation from you and your co-authors and at least a correction of the published paper.
All authors are responsible for the originality of the data presented for publication, so I ask you to share this communication with your co-authors. We would appreciate a reply by [DATE].