Chen, Qiyong
Liu, Linpo
Liang, Guiqing
Article History
First Online: 27 February 2018
Compliance with ethical guidelines
:
: Q. Chen, L. Liu and G. Liang declare that they have no competing interests.
: Ethical approval was given by the medical ethics committee of the Second Hospital of Fuzhou Affiliated to Xiamen University with the reference number 20160035. All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and the 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.