Zhang, Hongmin
He, Wei
Lian, Hui
Chen, Xiukai
Wang, Xiaoting
Chao, Yangong
Liu, Dawei
Article History
Received: 19 December 2019
Accepted: 9 March 2020
First Online: 30 March 2020
Ethics approval and consent to participate
: This study was approved by the institutional committee of Peking Union Medical College Hospital. Written inform consent was waived due to the retrospective and observational nature of this study.
: Not applicable.
: The authors declare that they have no competing interests.