Fan, Zhongyi
Chen, Liyan
Meng, Limin
Jiang, Haihua
Zhao, Qianqian
Zhang, Lili
Fang, Chun-Kai
Article History
Received: 20 December 2017
Accepted: 6 July 2018
First Online: 18 July 2018
Compliance with ethical standards
: The study protocol was approved by the institutional review boards of the study hospitals (NFEC-201709-K15).
: The authors declare that they have no conflict of interest.