Table 6.

Summarized articles related to COVID-19 and oral mucosa involvement

Author (s)/Year	Title	Highlights	Type/Ref.
Xu H. et al.[72] (February 2020)	High expression of the ACE2 receptor of 2019-nCoV on the epithelial cells of the oral mucosa	ACE2 is expressed on the mucosa of the oral cavity. This receptor was highly enriched in epithelial cells of the tongue. The oral cavity is a potentially high risk for 2019-nCoV infectious susceptibility and provided a piece of evidence for the future prevention strategy.	Original article/(49)