Research policy on humans and animals

All articles involving human participation must have been conducted in accordance with the ethical standards of the World Medical Association and the principles established in the Declaration of Helsinki.

In the case of studies involving animal experimentation or clinical trials (patients, patient material or medical data), we will require the approval of an Ethics Committee at the national, regional or institutional level with responsibility for animal/human research. If they have not received ethical approval, the authors must explain the reason, including an explanation of the study's adherence to the criteria proposed in the Declaration of Helsinki. In addition, they must include a statement that the experiments have been carried out with the prior informed consent of each of the participants.

Both the committee's authorization and the consents will be mentioned in the 'Methods' section of the document.