After selecting the articles for analysis Fig. 1, those that were included were listed in Table 1; overall, 116 were excluded and Table 2 lists those that were not included in the analysis, corresponding to the Pubmed and Lilacs databases.
1, los estudios incluidos se relacionan en la tabla 1; en total se excluyeron 116, de los cuales anexamos la tabla 2 con aquellos que no entraron en el análisis y correspondieron a la base de PubMed y Lilacs.