Funding for this research was provided by:
Key Technology Research and Development Program of Shandong (2019GSF108248)
Taishan Scholars Program of Shandong Province (ts20130913)
Received: 15 March 2021
Accepted: 19 July 2021
First Online: 26 August 2021
: This study was permitted by the Ethics Committee of Shandong Provincial ENT Hospital. .
: The authors declare that they have no competing interests.