Feng, L. X.
Wang, J.
Yu, Z.
Song, S. A.
Zhai, W. X.
Dong, S. H.
Yu, H. S.
Zhang, Y. http://orcid.org/0000-0003-0424-6844
Article History
Received: 11 June 2018
Accepted: 10 December 2018
First Online: 12 January 2019
Compliance with ethical standards
:
: All authors declare that there is no conflict of interest.
: This study was approved by the Ethics Committee of The Affiliated Hospital of Qingdao University.
: The written informed consent was obtained from all the patients.