Forensic Review of 'Hair Transplantation in Mice: Challenges and Solutions' (Asgari et al., Wound Repair and Regeneration, 2016)

Academic fraud report · Geng Detector

Summary

This report evaluates the article 'Hair Transplantation in Mice: Challenges and Solutions' (DOI: 10.1111/wrr.12435, Wound Repair and Regeneration, 2016) and rates it as highly suspicious ('orange' tier). The central concern is a statistical abnormality in Table 1: the authors applied a Pearson chi-square test to a 2x2 contingency table constructed from a very small sample (n=7 total mice: n=2 injured, n=5 uninjured), producing a reported p-value of 0.0082. For such sparse data, Fisher's exact test is the appropriate method; recomputation by the reviewer yields a two-sided p-value of approximately 0.0476, marginal rather than highly significant. A secondary concern is that the paper's principal claim about follicle cell contribution to wound re-epithelialization rests on only n=2 mice. Additional minor issues include a misspelling of the camera brand ('Cannon' for 'Canon'). Original images were not available for duplication or manipulation checks. Overall confidence is moderate; the statistical issue is reproducible from the reported data, but a formal misconduct determination requires original data and figure files.

Verdict

🟠 Highly suspicious. The main red flag is the use of an inappropriate statistical test (Pearson chi-square on a sparse 2x2 table) yielding a suspiciously clean p-value (0.0082) where the correct Fisher's exact test gives ~0.0476. A core biological claim is also based on an extremely small sample (n=2).

Key findings

Misapplied chi-square test (severity: 🟠): Table 1 compares GFP+ cell migration between injured (n=2) and uninjured (n=5) mice using Pearson's chi-square. Reported p = 0.0082. For a 2x2 table with such small expected counts, Fisher's exact test is mandatory.
Marginal vs. 'highly significant' p-value (severity: 🟠): Reviewer's recomputation of the reported 2/2 vs. 0/5 split via two-sided Fisher's exact test gives p ≈ 0.0476 — marginal, not the robustly significant figure the authors imply.
Underpowered core claim (severity: 🟡): The conclusion that hair follicle cells contribute to wound re-epithelialization rests on observations from only 2 mice.
Typographical carelessness (severity: 🟡): Camera brand misspelled as 'Cannon' instead of 'Canon' in the Methods ("Cannon [Tokyo, Japan] Powershot A520 cameras").
Unverified image integrity (severity: indeterminate): Original TIFFs/blots were not available; duplication, splicing, and threshold-manipulation checks could not be performed on Figures such as Figure 2.

Evidence highlights

DOI: 10.1111/wrr.12435
Reported chi-square p-value: 0.0082 (Table 1)
Sample sizes: injured n = 2, uninjured n = 5 (total N = 7)
Recomputed two-sided Fisher's exact p-value: ≈ 0.0476 (based on reported 2/2 vs. 0/5 migration outcomes)
Exact quote: "Cannon [Tokyo, Japan] Powershot A520 cameras"
Core claim supported by 2 mice

Notes

The statistical critique is reproducible directly from the numbers reported in Table 1; no speculation is required.
The misspelling of 'Canon' is presented as a minor indicator of editorial care rather than evidence of misconduct.
Because original microscopy and Western blot images were not accessible, image-based duplication or splicing could not be assessed and should be undertaken if raw files become available.
The report's conclusions are limited to methodological concerns; a formal determination of research misconduct would require investigation by the journal or institution, including access to raw data and figure source files.