Duplicate publication can introduce significant bias into a meta-analysis if studies are inadvertently included more than once. Many studies are published in more than one journal to maximize readership and impact of the study findings. Inclusion of multiple publications of the same study within a meta-analysis affords inappropriate weight to the duplicated data if reports of the same study are...

As with all research journals, EMHJ has encountered cases of suspected infringement of ethical research conduct and publication, including lack of ethical clearance and/or informed consent of participants when needed and instances of plagiarism and duplicate publication. Our experience in addressing such incidents suggested that in some cases the authors were genuinely unaware of or unfamiliar ...

Following publication of the original article [1] the authors reported that reference 15 (Cella et al.) had been incorrectly replaced with a duplicate of Brombin et al. during publication.

As with all research journals, EMHJ has encountered cases of suspected infringement of ethical research conduct and publication, including lack of ethical clearance and/or informed consent of participants when needed and instances of plagiarism and duplicate publication. Our experience in addressing such incidents suggested that in some cases the authors were genuinely unaware of or unfamiliar ...

As with all research journals, EMHJ has encountered cases of suspected infringement of ethical research conduct and publication, including lack of ethical clearance and/or informed consent of participants when needed and instances of plagiarism and duplicate publication. Our experience in addressing such incidents suggested that in some cases the authors were genuinely unaware of or unfamiliar ...

The similarity of documents in a large database of published Fractals articles was examined for redundancy. Three different text matching techniques were used on published Abstracts to identify redundancy candidates, and predictions were verified by reading full text versions of the redundancy candidate articles. A small fraction of the total articles in the database was judged to be redundant....

The purpose of this study was to examine trends in duplicate publication in Korean medical articles indexed in the KoreaMed database from 2004 to 2009, before and after a campaign against scientific misconduct launched by the Korean Association of Medical Journal Editors in 2006. The study covered period from 2007 to 2012; and 5% of the articles indexed in KoreaMed were retrieved by random samp...