@incollection{Hatem12, author = {Amin E. Hatem}, title = {Epidemiology and Risk Factors of Periodontal Disease}, booktitle = {Periodontal Diseases}, publisher = {IntechOpen}, address = {Rijeka}, year = {2012}, editor = {Jane Manakil}, chapter = {10}, doi = {10.5772/29272}, url = {https://doi.org/10.5772/29272} }