Yang, Jing
Guo, Xinli
Zhang, Hao
Zhang, Weiwei
Song, Jinen
Xu, Hui
Ma, Xuelei http://orcid.org/0000-0002-9148-5001
Article History
Received: 16 July 2019
Accepted: 2 December 2019
First Online: 16 December 2019
Ethics approval and consent to participate
: The Ethics Administration Office of West China Hospital, Sichuan University approved this retrospective study and waived the requirement for informed consent.
: Not applicable.
: The authors declare that they have no competing interests.