@article {ghallab2015systemic,
	title = {Systemic Risk Factors Associated with Periodontal Disease: From Hypothesis to Evidence},
	journal = {مؤتمرات كلية طب الفم والأسنان},
	year = {2015},
	note = {n/a},
	abstract = {n/a},
	author = {Noha A. Ghallab}
}
