Funding for this research was provided by:
National Natural Science Foundation of China (81770955, 81570879)
the Project of Shanghai Science and Technology (17411950200, 17140902900)
the National Natural Science Foundation of China for Young Scholar (81600762)
Text and Data Mining valid from 2019-08-22
Received: 31 December 2018
Accepted: 16 July 2019
First Online: 22 August 2019
Ethics approval and consent to participate
: This study was performed in accordance with the Declaration of Helsinki and was approved by the Ethics Committee of the Eye and ENT Hospital, Shanghai, China. Written informed consent was obtained from all subjects after the aims and nature of the study were explained to the participants.
: Written informed consent was obtained from the patients for publication of this article and any accompanying images. A copy of the written consent is available for review by the Editor of this journal.
: The authors declare that they have no competing interests.