EXPRESSION OF CONCERN: Role of Cytokines in Development of Pre-Eclampsia Associated with Periodontal Disease—Cohort Study

Expression of Concern: A. Kumar, N. Begum, S. Prasad, A. K. Lamba, M. Verma, S. Agarwal, S. Sharma, “ Role of Cytokines in Development of Pre-Eclampsia Associated with Periodontal Disease – Cohort Study,” Journal of Clinical Periodontology 41, no. 4 (2014): 357–365. https://doi.org/10.1111/jcpe.12226.

This Expression of Concern is for the above article, published online on 06 January 2014, in Wiley Online Library (wileyonlinelibrary.com), and has been issued by agreement between the journal Editor-in-Chief Panos N. Papapanou; and John Wiley and Sons Ltd. A third party raised concerns regarding unusual patterns in the data that suggested potential errors in data handling. The authors responded to an inquiry by the publisher and provided an explanation for these patterns in the data, but stated that the original data for the study conducted are unavailable due to the length of time since publication as well as requirements from the 2017 guidelines from the Indian Council of Medical Research. Following an evaluation of the available data by an external statistician, Wiley and the journal have determined that the analyses that have been conducted show evidence of flaws. The journal is issuing this Expression of Concern because the journal is not able to verify the accuracy of the data and the analyses in this article without the underlying dataset. Author N. Begum agrees with the Expression of Concern. Author A. Kumar does not agree with the Expression of Concern. All other authors did not respond to the notice regarding the Expression of Concern.