● Web of Science https://go.wolterskluwer.com/uptodate
● PubMed https://pubmed.ncbi.nlm.nih.gov/
● Google Academico https://scholar.google.es/
● Springer Link https://link.springer.com/
● OVID https://www.wolterskluwer.com/en/solutions/ovid
● Sciencie Direct https://www.sciencedirect.com/
● Scopus https://www.scopus.com/
● LILACS https://lilacs.bvsalud.org/es/
● Redalyc https://www.redalyc.org/
● LIS Regional https://bvsalud.org/portal-lis/
● Jon Trip Data base https://www.tripdatabase.com
● HONcode Seach https://www.hon.ch/en/
● REDALYC https://www.redalyc.org/
● DOAJ https://doaj.org
● PubMed Central https://pubmed.ncbi.nlm.nih.gov/
● BioMed Central https://www.biomedcentral.com/
● Scielo Regional https://scielo.org/
