Zhou, Yanhua
Zhang, Yanlin
Zhao, Haiying
Cui, Xuan
Wei, Yongqiu
Wu, Yongdong
Zhang, Shutian
Zong, Ye
Article History
Accepted: 10 September 2019
First Online: 23 October 2019
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: This study was approved by the ethics committee of Beijing Friendship Hospital, Capital Medical University. All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: All data published here are under the consent for publication. Written informed consent was obtained from all individual participants included in the study.