**Author details**

Quang Van Le1,2, Duy Quoc Ngo1 \*, Toan Duc Tran<sup>1</sup> and Quy Xuan Ngo<sup>1</sup>

1 Department of Head and Neck Surgery, Vietnam National Cancer Hospital, Hanoi, Vietnam

2 Hanoi Medical University, Hanoi, Vietnam

\*Address all correspondence to: duyyhn@gmail.com

© 2020 The Author(s). Licensee IntechOpen. This chapter is distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/ by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
