Zhou, Rongrong
Fei, Yanghonghong
Sun, Leqi
Guo, Jian
Zhou, Xiaofei
Zhang, Xudong
Article History
Received: 11 November 2018
Accepted: 28 April 2019
First Online: 15 May 2019
Compliance with Ethical Standards
:
: The authors declare that they have no conflict of interest.
: This study was approved by our institution’s ethics committee. All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: Informed consent was obtained from all individual participants included in the study.