Ethics approval: The study conformed to the Declaration of Helsinki and was approved by the review board/ethics committee of Tianjin Medical University.
Consent for publication: Not applicable.
Availability of data and materials: The datasets used and/or analysed during the current study are available from the corresponding author on reasonable request.
competing interests: The authors declare that they have no competing interests.
Funding: This is supported by National Natural Science Foundation of China (Grant Numbers 82020108007, 81830026) and Beijing-Tianjin-Hebei Special Project (Grant Number 19JCZDJC64300(Z), 20JCZXJC00180).
Author Contributions: Yaxin Zhang, Kang Feng, and Hua Yan had full access to all of the data in the study and take responsibility for the integrity of the data and the accuracy of the data analysis. Concept and design: Kang Feng. Acquisition, analysis, or interpretation of data: Yaxin Zhang, Kang Feng. Drafting of the manuscript: Yaxin Zhang. Critical revision of the manuscript for important intellectual content: Hua Yan. Statistical analysis: Kang Feng. Obtained funding: Hua Yan. Material support: Mengyu Liao. Supervision: Hua Yan.
Acknowledgment:
The People’s Hospital of Guangxi Zhuang Autonomous Region (Zhaoguang Lai, Dali Zheng, Lanjian Li, Fengmei Li, Chunli Diao, Xinxin Xie, Jing Liao, Jian Lv), Lanzhou University Second Hospital (Ning Du), The Affiliated Hospital of Inner Mongolia Medical University (Dan Zhu, Lin Li), Ningxia Eye Hospital (Xunlun Sheng, Juan Liu), Hebei Eye Hospital (Jinchen Jia), Tianjin Medical University General Hospital (Jingkai Zhang, Tiangeng He, Song Chen; Jinguo Yu, Baoqun Yao, Wenhui Yang, Yu Meng, Haixia Guo, Zhiyong Sun, Caiyun You, Mingxue Zhang, Pinting Zhao, Yuanyuan Liu, Feng Jiang, Likun Yang, Xiangda Meng, Chunjie Mao), Affiliated Zhongshan Hospital of Dalian University (Ming Zhou, Qi Wu), Henan Provincial People's Hospital (Xuemin Jin, Hongling Chen, Xianliang Zhang, Ruixing Liu), The First Affiliated Hospital of Zhengzhou University (Yong Lv, Pengyi Zhou), Xiamen Eye Center of Xiamen University (Jinhong Cai, Haibo Li, Yanming Huang, Duanxiao Wu, Qiuping Huang, Donghai Guan), Nanjing Drum Tower Hospital (Zhenggao Xie, Ruiying Gao), Shandong Eye Hospital (Ting Wang, Ting Zhang, Xi Lu, Liying Wang, Lan Yao, Lichao Wang, Yabin Tian, Dongmin Yuan), Lixiang Eye Hospital of Soochow University (Xun Yang, Youyou Zha), Xijing Hospital (Dan Hu, Zifeng Zhang, Jing Wu, Xiaxia Yang), The Second Affiliated Hospital Zhejiang University School of Medicine (Jijian Lin), First Affiliated Hospital of Kunming Medical University (Ling Yuan), The First Affiliated Hospital of Chongqing Medical University (Hui Peng), West China Hospital, Sichuan University (Meixia Zhang), Eye & E.N.T. Hospital of Fudan University (Rui Jiang, Han Chen), The First Clinical Hospital Affiliated to Harbin Medical University (Weiqi Gao, Haitao Du, Ruishu Li, Linan Guan, Zhen Zhang, Xiaoyuan Wang, Zhanghui Yang), Shanghai Ninth People's Hospital, Shanghai JiaoTong University School of Medicine (Chaoyang Wang, Junzhao Chen), Tianjin Eye Hospital (Hao Jiang, Wei Zhang, Yang Liu, Bincui Cai, Maoyu Cai), Union Hospital Tongji Medical College Huazhong University of Science and Technology (Fagang Jiang, Junjie Yang, Xiaobo Yang, Wan Li, Xinghua Wang, Yushuai Liu, Wei Liu, Shiyun Jiang, Bo Han, Jiasong Wang, Kangkang Xu, Jie Zhang, Shenggang Feng, Xin Liu, Huatao Xie), Renmin Hospital of Wuhan University (Zhen Chen, Yu Zhang), Ningbo Eye Hospital (Heding Zhou, Zhaomeng Shen, Caicai Le, Junliang Wang, Ling Tu, Hanxiao Wu, Zhisha Bai), Chinese PLA General Hospital (Yi Yao, Xiaocui Liu), Peking University People’s Hospital (Wenzhen Yu), Sichuan University West China Hospital (Meixia Zhang), Peking University Third Hospital (Xin Xie), Beijing Tsinghua Changgung Hospital (Yuntao Hu, Qihua Wang), China-Japan Friendship Hospital (Zhijun Wang, Yujie Yan).
Both figures were created by the author of this article using Excel (2016 version, Microsoft, Redmond, USA).
Statement: According to the requirements of the Ethics Committee of Tianjin Medical University, this study is a retrospective study and does not include the names of patients, so there is no need to apply for ethics.