For the selection of articles, the PubMed database, of the Medline library Medical Literature Analysis and Retrieval System Online was used.
Para la selección de artículos, se utilizó la base de datos PubMed, de la biblioteca Medline Medical Literature Analysis and Retrieval System Online.
Para a seleção de artigos, utilizou-se a base de dados PubMed, da biblioteca Medline Medical Literature Analysis and Retrieval System Online.