Xiao, Ruotao
Xu, Chuxiao
He, Wei
Liu, Lei
Zhang, Hongxian
Liu, Cheng
Ma, Lulin
Article History
Received: 6 September 2020
Accepted: 11 February 2021
First Online: 27 February 2021
Ethics approval and consent to participate
: The study was approved by the Peking University Third Hospital Medical Science Research Ethics Committee. All the procedures were performed as per the Declaration of Helsinki and relevant policies in China. Due to the retrospective nature of the study, patient consent was waived.
: Not applicable.
: The authors declare that they have no competing interests.