"Additionally, the authors have stated that the panels in question follow the same tissue explant first at time 24h (panel 5a), when it is healthy, and then at 52h (panel 5b), when a subset of axons have degenerated (those distal to the floor plate), and that these two panels are meant to be illustrative of the key result, which is the quantification in panel 5c."
"The Editors are issuing an Expression of Concern for this article to alert readers that panels in Fig. 5a and 5b appear to contain multiple regions where the background is unexpectedly similar. The authors have stated that given the age of the article, the original data are no longer available. The Editors advise readers to interpret the results and conclusions of this article with caution."
Panels in Fig. 5a and 5b contain multiple regions where the background is unexpectedly similar. The panels follow the same tissue explant first at 24h (panel 5a), when healthy, and then at 52h (panel 5b), when a subset of axons have degenerated, specifically those distal to the floor plate. These two panels are presented as illustrative examples for the quantified result shown in panel 5c. The original underlying data are no longer available due to the passage of time. Readers should interpret the results and conclusions with caution.
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