Research involving human beings and/or animals

All articles whose research has required human participants must be carried out in compliance with the ethical norms of the World Medical Association (WMA) and with the principles established in the Declaration of Helsinki (DoH).

Studies that involve animal experimentation or clinical trials (patients, samples from patients and/or personal data), must have the corresponding report of approval from a Research Ethics Committee whether at the national, regional or institutional levels. If no ethical approval is provided, authors must explain the motive, including an explanation about the study’s adherence to the criteria included in the DoH. In addition, they must state that the experiments have been carried out with the prior informed consent of each of the participants involved.

Both the committee’s authorization and the participant’s consent must be mentioned in the section 'Methodology'.