Zhang, Heng http://orcid.org/0000-0002-9396-7055
Zhou, Jiansheng
Guan, Jianzhong
Ding, Hai
Wang, Zhiyan
Dong, Qirong
Article History
Received: 26 June 2019
Accepted: 12 September 2019
First Online: 29 October 2019
Ethics approval and consent to participate
: This retrospective study was approved by the Ethics Committee on Human Research of the first affiliated hospital of Bengbu Medical College, and informed consent was obtained from all involved patients.
: This retrospective study was well understood and agreed by all the enrolled patients, which was recorded in the consent for publication.
: The authors declare that they have no competing interests.