Cagnani, A., Barros, A.M. de S., Sousa, L.L.A. de, Zanin, L., Bergamaschi, C. de C., Peruzzo, D.C. and Flório, F.M. 2016. Periodontal disease as a risk factor for aspiration pneumonia: a systematic review . Bioscience Journal . 32, 3 (Jun. 2016), 813–821. DOI:https://doi.org/10.14393/BJ-v32n3a2016-33210.