The research, which follows the rules of Resolution 466/2012, was authorized by the Municipal Secretary of Health and approved by the Research Ethics Committee of the Federal University of Rio Grande do Norte, under dictum 510825/2014.
Entre ellos, 2 fueron publicados en 2008, 4 en 2009, 2 en 2011 y 1 en 2012, representando el sostenido interés de los investigadores por el tema.