Qiao, Qingyan
Wang, Fei
Gu, Yanhong
Article History
Received: 31 January 2018
Accepted: 21 August 2018
First Online: 11 September 2018
Compliance with ethical standards
:
: The authors declare that they have no conflicts of interest.
: 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.
: The ethics committee of Shanghai Pudong Hospital approved this study, and all patients signed informed consent.