Zou, Yinying
Xu, Liming
Tang, Qiusu
You, Qihan
Wang, Xiaoling
Ding, Wei
Zhao, Jing
Ren, Guoping
Article History
Received: 19 May 2019
Accepted: 12 April 2020
First Online: 22 April 2020
Ethics approval and consent to participate
: This study was approved by the ethics committee of the First Affiliated Hospital of Zhejiang University, which waived the need for consent because the data were analyzed anonymously.
: Not applicable.
: The authors declare that they have no competing interests.