Funding for this research was provided by:
Innovative Research Group Project of the National Natural Science Foundation of China (81670820, 81700806)
Article History
Received: 10 September 2019
Accepted: 18 December 2019
First Online: 26 December 2019
Ethics approval and consent to participate
: All procedures were conducted according to the protocols and guidelines approved by Ethics Committee of EENT Hospital of Fudan University and were performed following the declaration of Helsinki.
: Not applicable.
: The authors declare that they have no competing interests.