Category: data issues

Researchers retract paper after they run out of breast milk

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If you think something is amiss with your data, running an experiment again to figure out what’s going on is a good move. But it’s not always possible.

A team of researchers in Seoul recently found themselves in a bind when they needed to check their work, but were out of a key substance: breast milk.

The shortage led them to the retract their 2016 paper on a micronutrient found in breast milk that helps protect infants’ retinas. “Association between lutein intake and lutein concentrations in human milk samples from lactating mothers in South Korea,” was published online last spring in the European Journal of Clinical Nutrition. 

Here’s the retraction notice: 

Continue reading Researchers retract paper after they run out of breast milk

Stolen data prompts Science to flag debated study of fish and plastics

scienceIn August, Science told us it was considering adding an Expression of Concern to a high-profile paper about how human pollution is harming fish — and yesterday, the journal did it.

The move comes after a group of researchers alleged the paper contains missing data, and the authors followed a problematic methodology. In September, however, the co-authors’ institution, Uppsala University in Sweden, concluded there wasn’t enough evidence to launch a misconduct investigation.

The notice from Science stems from the theft of a computer carrying some of the paper’s raw data, making it impossible to reproduce some of its findings: Continue reading Stolen data prompts Science to flag debated study of fish and plastics

University of Tokyo opens investigation into retracted stem cell paper

KCCY_15_22_COVER.inddThe University of Tokyo is investigating a 2011 stem cell paper in Cell Cycle, recently retracted over irregularities in four figures.

The university has confirmed there is an investigation, but would not specify which paper it concerned; the corresponding author on the paper, however, confirmed to us that it is the focus of the investigation.

In the retraction notice, published Nov. 1, the journal wrote: Continue reading University of Tokyo opens investigation into retracted stem cell paper

Tomato study didn’t get co-author okays, includes unreliable data

scientia-horticulturaeA journal has retracted a paper examining the traits of drought-resistant tomatoes after an investigation at the first author’s institution in Italy found a number of problems.

For starters, the first author — Maria Riccardi of the National Research Council of Italy-Institute for Agricultural and Forest Systems in the Mediterranean (CNR-ISAFOM) in Ercolano, Naples, Italy — apparently submitted the paper without consulting the study’s four other listed co-authors. What’s more, according to the retraction notice in Scientia Horticulturae, the paper’s description of the experiment “does not reflect the real conditions under which the data was collected,” rendering the findings invalid.  

Riccardo d’Andria, CNR-ISAFOM’s former director who conducted an investigation into the case, said Continue reading Tomato study didn’t get co-author okays, includes unreliable data

Authors pull two papers about faulty glucose meters after industry prompts

4.coverTwo papers evaluating glucose meters — used by diabetics to monitor blood sugar levels — suggested that a couple of the devices don’t work as well as they should. Perhaps unsurprisingly, the companies that sell those meters objected to how the studies were conducted. By all accounts, the companies appear to be justified in their complaints.

In both cases, researchers used blood drawn from veins to test the meters. But manufacturers of the WaveSense JAZZ and GlucoRx glucose meters said their devices are designed to work with fresh blood from a finger-prick. Both papers have now been retracted.

The retraction notice for “Technical and clinical accuracy of five blood glucose meters: clinical impact assessment using error grid analysis and insulin sliding scales,” published in 2015 in the Journal of Clinical Pathology, hints at the issue:

Continue reading Authors pull two papers about faulty glucose meters after industry prompts

Analysis casts doubt on bone researcher’s body of work

19-coverA new analysis of more than 30 clinical trials co-authored by a bone researcher based in Japan is casting doubt on the legitimacy of the findings.

Yoshihiro Sato, based at Mitate Hospital, has already retracted 12 papers, for reasons ranging from data problems, to including co-authors without their consent, to self-plagiarism. Most of these retracted papers are included in the analysis in the journal Neurology, which concluded that Sato’s 33 randomized clinical trials exhibited patterns that suggest systematic problems with the results.

Other researchers have used similar approaches to analyze a researcher’s body of work — notably, when John Carlisle applied statistical tools to uncover problems in the research of notorious fraudster Yoshitaka Fujii, and Uri Simonsohn, who sniffed out problems with the work of social psychologist  Dirk Smeesters.

Author Mark Bolland of the University of Auckland told us he was surprised by his findings: Continue reading Analysis casts doubt on bone researcher’s body of work

Genetics study flagged for reliability issues by Frontiers journal

frontiers-in-geneticsA genetics journal has issued an expression of concern (EOC) for a study after an investigation by its chief editors.

According to the notice in Frontiers in Genetics, the authors of the paper — based at Hokkaido University in Sapporo, Japan — are conducting further experiments to resolve the issues raised by the journal’s investigation.

In February, the same paper received a corrigendum due to errors in the assembly of one of the figures.

Here’s the EOC, issued earlier this week: Continue reading Genetics study flagged for reliability issues by Frontiers journal

Authors retract third cancer paper for missing original data

international-journal-of-oncologyResearchers have retracted their third paper due to missing original data, following an investigation at their former institution in New York.

We’ve previously reported on two retractions of papers co-authored by Bhagavathi Narayanan and Narayanan K. Narayanan, previously based at the New York University (NYU) School of Medicine. The studies were pulled when the pair couldn’t provide original images to investigators at NYU School of Medicine. One author has blamed the lack of original data on the abrupt closure of her previous institution in 2004, after it allegedly misspent millions in federal grants. 

However, the latest retraction affects a paper published eight years later in the International Journal of Oncology. Its coauthors include Bhagavathi Narayanan, Narayanan K. Narayanan and Rajkishen Narayanan; we haven’t been able to uncover if there is a relation between them.

A spokesperson for the NYU School of Medicine sent us this statement: Continue reading Authors retract third cancer paper for missing original data

Cancer paper flagged due to “credible” concerns over its reliability, journal says

rsc-advancesA journal has issued an expression of concern (EOC) for a cancer study after the publisher received what it called a “credible” tip that its results may not be reliable.

According to the EOC, published in RSC Advances, the paper is now under investigation.

Here’s the EOC for “Filled and peptide-modified single-walled carbon nanotubes: synthesis, characterization, and in vitro test for cancer cell targeting:” Continue reading Cancer paper flagged due to “credible” concerns over its reliability, journal says

Despite retraction, antipsychotics still effective, safe for dementia, says author

alzheimers-research-and-therapyResearchers have retracted a systematic review that suggested that antipsychotic drugs are effective and safe for patients with symptoms of dementia — but claim their re-analysis of the updated data still comes to the same conclusions.

According to the retraction notice in Alzheimer’s Research and Therapy, some participants were incorrectly included twice in the meta-analysis. 

The corresponding authors recently lost another paper for an entirely different reason — earlier this year, we reported on a retraction in Annals of Neurology for Jin-Tai Yu and Lan Tan, affiliated with the Ocean University of China, Qingdao University, and Nanjing Medical University in China. The authors pulled that paper after appearing to pass off others’ data as their own.

Here’s the retraction notice for the review, issued earlier this year: Continue reading Despite retraction, antipsychotics still effective, safe for dementia, says author