Funding for this research was provided by:
National Natural Science Foundation of China (81570895, 81420108009)
National Key R & D Program of China (2016YFC20160905200)
Changjiang scholars and innovative research team (IRT13082)
special fund of capital health development (2011-1017-06, 2011-1017-02)
special fund of sanitation elite reconstruction of Beijing (2009-2-007)
Beijing health bureau program for high level talents (2011-3-043)
Beijing Municipal Administration of Hospitals’ Mission Plan (SML20150203)
Capital citizenry health program (z161100000116062)
Received: 14 November 2019
Accepted: 8 December 2019
First Online: 19 December 2019
Ethics approval and consent to participate
: The study was approved by the ethics review board of the Beijing TongRen hospital and Beijing Institute of Otolaryngology, P. R. China (TRECKY2017-06); and written informed consent was obtained from all participants before enrolment into the study.
: Not applicable.
: The authors declare that they have no competing interests.