Table 2.

Scope and outcomes of investigations undertaken by four academic institutions

	Institution
	1a	2c	3	4
Investigations by academic institutions
Scope	38 papers, first author primary respondent	7 papers, first author primary respondent	Uncertain	5 papers, first author primary respondent
Employees investigated, N	Uncertain	1	Uncertain	Uncertain
Date of report	17 November 2017	23 August 2018	Not available	30 May 2018
Decisions	Research misconduct primary respondent No research misconduct other employees associated with investigated papers	No misconduct	Not available	Duplicate reporting present ‘Concerns about integrity of research well-justified’
Recommendations	Retraction of 14 papers, 7 of which were already retracted. Remaining 24 papers, no clear evidence of fraud	Retraction of 2 papers, to be actioned by primary respondent. Noted 1 existing retraction, overlooked another.	Not available	No action
Report publicly available	Yesb	No	Not applicable	No
Subsequent response from our group	Raised specific concerns about 18 papers for which the investigation could not determine integrity	Reiterated concerns about > 100 papers	Not applicable	Concerns not addressed or resolved for any publication
Current status	Further investigation commenced	Uncertain	Ongoing	Further investigation commenced

^aPreliminary investigation November 2016–January 2017, full investigation commenced March 2017

^bJapanese language only

^cEarlier investigation March 2016–January 2017