Funding for this research was provided by:
Universidad de La Frontera (Proyecto de Internacionalización para Investigación y Productividad 2019)
Received: 1 October 2019
Accepted: 31 March 2020
First Online: 16 April 2020
Ethics approval and consent to participate
: Formal ethical approval is not required as no primary data will be collected. As such, there are no patients involved, so the consent of the patient to participate is not required.
: Not applicable.
: The authors declare that they have no competing interest. Rodrigo Mariño is a Section Editor for BMC Oral Health and Carlos Zaror is Associate Editor for BMC Oral Health.