Retraction Watch

Tracking retractions as a window into the scientific process

Archive for the ‘NAS’ Category

What leads to bias in the scientific literature? New study tries to answer

with 4 comments

By now, most of our readers are aware that some fields of science have a reproducibility problem. Part of the problem, some argue, is the publishing community’s bias toward dramatic findings — namely, studies that show something has an effect on something else are more likely to be published than studies that don’t.

Many have argued that scientists publish such data because that’s what is rewarded — by journals and, indirectly, by funders and employers, who judge a scientist based on his or her publication record. But a new meta-analysis in PNAS is saying it’s a bit more complicated than that.

In a paper released today, researchers led by Daniele Fanelli and John Ioannidis — both at Stanford University — suggest that the so-called “pressure-to-publish” does not appear to bias studies toward larger so-called “effect sizes.” Instead, the researchers argue that other factors were a bigger source of bias than the pressure-to-publish, namely the use of small sample sizes (which could contain a skewed sample that shows stronger effects), and relegating studies with smaller effects to the “gray literature,” such as conference proceedings, PhD theses, and other less publicized formats.

However, Ferric Fang of the University of Washington — who did not participate in the study — approached the findings with some caution:

Read the rest of this entry »

Written by Alison McCook

March 20th, 2017 at 3:00 pm

Another correction for prominent cancer researcher who’s dodged accusations for decades

with one comment

The chair of a biology department who has faced years of misconduct accusations has taken another hit—a lengthy correction due to text “overlap” between one of his PNAS papers and six other articles.

According to the correction, a reader contacted the journal to notify the editors that text and sentences in multiple sections of the 2015 paper — on which Carlo Croce is last author — were lifted from other sources without quotation marks.

This is the second correction for Croce in PNAS regarding overlap issues in just the last few weeks—the first was published on March 7 (see here). In both instances, PNAS did not call the textual similarities plagiarism, but the notice details multiple instances of overlap.

Croce, the chair of the department of cancer biology and genetics at The Ohio State University (OSU), is no stranger to controversy.

Read the rest of this entry »

Written by Victoria Stern

March 15th, 2017 at 11:30 am

Cancer researcher has dodged accusations for decades (and has a new correction)

with 34 comments

Today isn’t a great day for Carlo Croce, chair of the department of cancer biology and genetics at The Ohio State University (OSU).

The New York Times has a lengthy article detailing the misconduct accusations that have swirled around Croce for years. We’ve covered many, but The Gray Lady obtained documents that show there have been many more.

The story mentions a 2013 letter from Ohio State University to pseudonymous whistleblower Clare Francis (which we reported on in 2014), acknowledging Francis’s allegations against Croce. However, in the letter, an administrator said OSU saw no reason to investigate Croce.

The story didn’t stop there, as the Times reports:

Read the rest of this entry »

Researchers retract two well-cited papers for misconduct

with 3 comments

A scientist in Germany has lost two papers that were collectively cited more than 500 times, after an investigation at her former university found her guilty of scientific misconduct.

The probe into Tina Wenz by the University of Cologne in Germany, her former employer, recommended that six of her papers — which have induced some chatter on PubPeer — should be retracted. One of these papers was pulled by Cell Metabolism last year. Now, Cell Metabolism has pulled another of Wenz’s papers, and she has also lost another study published in the Proceedings of the National Academy of Sciences (PNAS), which was previously corrected. 

First, here’s the PNAS retraction notice, issued today: Read the rest of this entry »

Authors retract PNAS paper suggesting silk stabilizes vaccines

with 2 comments

PNASA PNAS paper that caught the media’s attention for suggesting that adding silk could stabilize vaccines and antibiotics has been pulled after the authors realized there were significant errors in the data analysis. 

According to the notice, the authors agreed to retract the 2012 paper; however, the corresponding author told us the authors did not think a retraction was required as, according to him, the conclusions remained valid.

The paper presented a solution to the long-standing problem that sensitive biological compounds such as vaccines and antibiotics begin to lose their effectiveness outside the recommended temperature range, and naturally biodegrade over time. The degradation process cannot be reversed, and may even speed up during transport or storage under less ideal temperatures.

Here’s the retraction notice: Read the rest of this entry »

Shigeaki Kato up to 38 retractions

with 2 comments

Shigeaki Kato

Shigeaki Kato

Our retraction notice count for Shigeaki Kato, number seven on our leaderboard, has grown to 38.

The former University of Tokyo endocrinologist recently earned another retraction, for a paper in Archives of Biochemistry and Biophysics that contained image manipulation. As we’ve noted before, Kato resigned from the university in 2012 as it investigated his work for misconduct; in 2013 a Japanese newspaper reported that the investigation had found 43 papers from his lab contained “likely altered or forged materials.”

In addition to the new retraction, we’ve dug up four others for Kato from the past few years, plus one correction. Two of the retraction notices mention an investigation at the University of Tokyo.

First, the retraction note for “Multiple co-activator complexes support ligand-induced transactivation function of VDR,” published in December:

Read the rest of this entry »

Fast-tracked PNAS papers are cited less often — but gap is shrinking

with one comment

PNASAn analysis of more than 50,000 papers submitted to Proceedings of the National Academy of Sciences (PNAS) shows that those published using its “contributed track” — in which academy members can fast-track their own papers by coordinating the peer-review process themselves — have been cited less often than regular submissions, but that gap is shrinking.

Although the overall average difference in citations between contributed and regular submissions was 9%, the yearly difference has declined from 13.6% in 2005 to 2.2% in 2014, according to the new study, posted before peer review on the preprint server bioRxiv by Phil Davis, an independent researcher and publishing consultant based in New York.

The contributed track is a long-standing editorial practice of PNAS, which has triggered concerns from some academics that say Read the rest of this entry »

Written by Dalmeet Singh Chawla

January 15th, 2016 at 12:45 pm

Stem cell researcher Jacob Hanna’s correction count updated to 10

with 11 comments

Jacob Hanna

Jacob Hanna

Thanks to some eagle-eyed readers, we’ve been alerted to some corrections for high profile stem cell scientist Jacob Hanna that we had missed, bringing our count to one retraction and 13 errata on 10 papers.

The problems in the work range from duplications of images, to inadvertent deletions in figures, to failures by his co-authors to disclose funding sources or conflicts of interest. Hanna is the first or last author on 4 of the papers, and one of several on the rest.

First up, a correction to a Cell paper on which Hanna is the first author:

Read the rest of this entry »

First author refuses to sign PNAS retraction after “key findings” are not reproduced

with 3 comments


Two out of the three authors of a PNAS paper on mutations underlying lung diseases are pulling it after failing to reproduce key findings.

The paper, published in 2012, investigated how mutations in lung surfactant genes induce molecular changes that lead to lung pulmonary fibrosis and lung cancer might work. But follow-up work revealed problems. In the retraction note, last author Christine Kim Garcia and second author Christoper Cano, both at the University of Texas Southwestern Medical Center, write:

Current members of the C.K.G. laboratory are unable to reproduce key findings reported in the paper.

Here’s the retraction note in full:

Read the rest of this entry »

Voinnet notches second retraction, two more corrections

with 7 comments

PNASOlivier Voinnet — a plant researcher who was recently suspended for two years from the Centre national de la recherche scientifique (CNRS) after an investigation by ETH Zurich and CNRS found evidence of misconduct — has issued his second retraction and two more corrections.

PNAS posted the retraction earlier this week for a 2006 article after an inspection of the raw data revealed “errors” in study images. Authors confirmed the issues in some figures and revealed “additional mounting mistakes” in others.

Voinnet has promised to issue retractions and corrections for every study that requires them. These latest notices bring our tally up to nine corrections, two retractions and one Expression of Concern.

Read the rest of this entry »