Articles that were duplicated in the databases were excluded, as were those that were inaccessible or considered inadequate for the aim of this review.
Se excluyeron los artículos duplicados en las bases, los inaccesibles y los que se consideraron inadecuados en relación al objeto de la investigación.
Foram excluídos artigos duplicados nas bases, inacessíveis e considerados inadequados ao objeto da pesquisa.