Carvajal, P., Gómez, M., Gomes, S., Costa, R., Toledo, A., Solanes, F., Romanelli, H., Oppermann, R., Rösing, C., & Gamonal, J. (2016). Prevalence, severity, and risk indicators of gingival inflammation in a multi-center study on South American adults: a cross sectional study . Journal of Applied Oral Science, 24(5), 524-534. https://doi.org/10.1590/1678-775720160178