Retraction Watch

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Society recommends 9 retractions for co-author of researcher with record number of retractions

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The Japanese Society of Anesthesiologists (JSA) has requested the retraction of nine additional papers by a co-author of fraudster Yoshitaka Fujii, after investigating allegations of fraud in dozens of papers.

According to the report, a committee investigated approximately 40 publications by Yuhji Saitoh of Yachiyo Medical Center and Tokyo Women’s Medical University and “identified ten publications with clear ethics violations, one of which has already been retracted.”

Saitoh has collaborated on many papers with Fujii, an anesthesia researcher with more than 180 retractions. As we reported, Saitoh resigned from the JSA when the investigation began, and the society permanently banned him. Read the rest of this entry »

Written by Victoria Stern

October 9th, 2017 at 8:10 am

Anesthesiology society bans co-author of researcher with record-number of retractions

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The Japanese Society of Anesthesiologists has permanently banned a co-author of notorious fraudster Yoshitaka Fujii, after investigating many of his publications for alleged fraud.

According to the announcement last month (in Japanese), a committee investigated approximately 40 publications by Yuhji Saitoh of Yachiyo Medical Center and Tokyo Women’s Medical University in Japan. Saitoh resigned from the society once the investigation started; after the committee found evidence of data manipulation and fraud, the society decided it would permanently ban him as a member.

Saitoh was a frequent co-author of Yoshitaka Fujii, an anesthesia researcher with a record-breaking number of retractions (more than 180). Last year, anesthesia fraud sleuth John Carlisle and a co-author analyzed Saitoh’s papers — including many he didn’t co-author with Fujii — and concluded there was very low likelihood the sampling had been conducted randomly, among other potential concerns.

On May 9, the Japanese Society of Anesthesiologists issued the following statement, which we translated:

Read the rest of this entry »

Written by Alison McCook

June 6th, 2017 at 11:30 am

Co-author of retraction record-holder likely fabricated his own data, analysis shows

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In 2012, John Carlisle, a British anesthesiologist, demonstrated conclusively using statistics that Yoshitaka Fujii had faked data in many studies. Fujii — as followers of this blog well know — now holds the record for most retractions by an individual author (183).

Carlisle’s work accomplished two things: It put to rest any doubt that problems with Fujii’s work might have resulted from innocent mistakes, and it gave journals a mathematical tool for conducting investigations into potential cases of misconduct.

Now comes the payoff. In a new paper, Carlisle and another anesthesiologist, John Loadsman, take aim at one of Fujii’s frequent co-authors, Yuhji Saitoh of Yachiyo Medical Center and Tokyo Women’s Medical University in Japan. The pair analyzed data from 31 studies Saitoh published between 1993 and 2012 — including one study that was rejected in 2015 — for a total of 32 papers. Of those, 23 did not include Fujii as an author.

Writing in the journal Anaesthesia, where Carlisle published his first study about Fujii, he and Loadsman state that: Read the rest of this entry »

Anesthesia journal pulls study lacking patient consent

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Journal of AnesthesiaAn anesthesia journal has retracted a paper after an author admitted that the study did not obtain appropriate consent from patients receiving a neuromuscular block in muscles on the face and hands. 

The first author, Yuhji Saitoh, has the same name as a co-author of Yoshitaka Fujii, the all-time record holder with 183 retractions listed on our leaderboard. Thirty-six of those retracted papers include a co-author with the name of Yuhji Saitoh, but we were unable to confirm this is the same person listed on the newly retracted paper.  

Here’s the retraction notice, issued by the Journal of Anesthesia on August 11: Read the rest of this entry »