Zang, Chuanshan
Sun, Jian http://orcid.org/0000-0003-0368-4084
Liu, Wenyi
Chu, Chunqin
Jiang, Liwei
Ge, Ruifeng
Article History
Received: 27 August 2018
Accepted: 16 April 2019
First Online: 3 June 2019
Compliance with ethical standards
:
: All authors declare that they have no financial or other conflicts of interest in relation to this research and its publication.
: Ethics Committee of Affiliated Hospital of Qingdao University approved the research, and written informed consent was given by all participants.