Jian, Xie
Chao, Song
Xiaoli, Zhang
Aiwu, Wang
Article History
Received: 11 September 2019
Revised: 6 November 2019
Accepted: 20 November 2019
First Online: 3 December 2019
Compliance with ethical standards
:
: The author(s) declare that they have no conflict of interest.
: The study was approved by the Institutional Ethic Committee of No.3 Hospital of Shandong (3SDH-2016-190).
: Informed consent was obtained from all individual participants included in the study.