Chart 1. Items evaluated for the preparation of the Ethics Requirement Score.

Approval by CEP	Require approval by a CEP, as per the Declaration of Helsinki, published in 1964
Declaration of Helsinki and/or Resolution 196/96	Mention some of these documents that regulate ethics in research
Recommendations alerting about plagiarism	Contain an item recommended by the author as to plagiarism
ICF	Require that signing of an ICF be applied to all research subjects, as per the Declaration of Helsinki published in 1964
Confidentiality of patients and data	Contain an item recommending confidentiality about the data from the subjects involved in the research and their data
Recording in databases for clinical trials	Contain recommendations of a register of clinical trials in a database
Declaration of conflicts of interests	Contain orientation in reference to the interests of the said study
Declaration of funding	Contain orientation that makes clear the financial sources of the said study
ICMJE/COPE	Refer to the ICMJE or the COPE, which are related to ethics in scientific publications

CEP: Research Ethics Committee; ICF: Informed Consent Form; ICMJE: International Committee of Medical Journal Editors, COPE: Committee on Publication Ethics.