Li, Zenghui
Li, Ning
Sun, Xiaomei
Wang, Jing
Article History
Received: 31 January 2019
Accepted: 14 May 2019
First Online: 21 May 2019
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: All patients have written informed consents.
: This study had been approved by the Affiliated Yantai Yuhuangding Hospital of Qingdao University Medical College.