Authors must disclose all conflicts of interest (which can have influence for value of article) to the Editor and describe them in dedicated form, which is a part of the submitting process. The reviewers and editors are also obliged to disclose in a letter to Editor-in-chief all connections which could be suspected as conflict of interests with the author. If no conflict of interest exists, the authors should include a phrase: The authors do not report any financial or personal connections with other persons or organizations, which might negatively affect the contents of this publication and/or claim authorship rights to this publication (an example).