Conflicts of interest

We ask editors and reviewers to inform the editor-in-chief if they hold a conflict of interests that may prejudice the review report, either in a positive or negative way. The editorial office will check as far as possible before invitation, however we appreciate the cooperation of editors and reviewers in this matter. Editors and reviewers who are invited to access a manuscript they previously reviewed for another journal should inform the editor-in-chief. This situation may not be considerated as a conflict of interest in itself and it may be an improvement compared to the previous version. However, the possibility of plagiarism should be verified.