Song, Xinmao
Wang, Jie
Wang, Shengzi
Wang, Weifang
Wang, Shuyi
Zhu, Wenjia
Article History
Received: 22 December 2017
Revised: 17 March 2018
Accepted: 21 March 2018
First Online: 29 April 2018
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: The study was approved by the Medical Ethical Committee of the EENT Hospital. Research was performed in accordance with the Declaration of Helsinki.
: Informed consent was obtained from all individual participants included in the study.