Hinz M, Stein A, Cole T. Drug Healthc Patient Saf. 2014;6:93–99.
The Editor-in-Chief and Publisher of Drug, Healthcare and Patient Safety wish to issue an Expression of Concern for the published article.
Concerns have been raised regarding the alleged undisclosed competing interests of some of the authors, and the level of information provided on methodology, study data and process of institutional ethical approval for the published article. Drug, Healthcare and Patient Safety would like to alert readers of this while our investigation is still ongoing and we will provide an update following the conclusion of our investigation.
The authors have been informed of these concerns and of our investigation.