Declaration of interests

All authors must disclose any financial and personal relationships with other people or organizations that could inappropriately influence or bias their work.

Funding sources

§  Authors must disclose any funding sources who provided financial support for the conduct of the research and/or preparation of the article.

§  If no funding has been provided for the research, it is recommended to include the following sentence: this research did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors.