Cochrane has not consistently followed the COPE guidelines

Ref ID	687
First Author	H. Hemila
Journal	EUROPEAN JOURNAL OF CLINICAL INVESTIGATION
Year Of Publishing	2020
URL	https://dx.doi.org/10.1111/eci.13216
Keywords	• Vitamins and supplements • Cochrane • Open data • Transparency • Error
Problem(s)	• Weaknesses identified in some Cochrane reviews • Errors in effect estimate calculations or data synthesis • Data extraction errors and double counting
Number of systematic reviews included	1
Summary of Findings	Data extraction and data synthesis errors highlighted by the author, were subsequently replaced in the Cochrane review. However the author's comment regarding these errors and the original erroneous figures from review were removed from the scientific record of the Cochrane library.
Did the article find that the problem(s) led to qualitative changes in interpretation of the results?	N/A
Are the methods of the article described in enough detail to replicate the study?	N/A