Funding for this research was provided by:
National Natural Science Foundation of China (81300450)
Text and Data Mining valid from 2018-06-11
Received: 26 February 2018
Accepted: 30 May 2018
First Online: 11 June 2018
Ethics approval and consent to participate
: The study has been approved by the Ethical Committee of the China-Japan Friendship Hospital (Reference Number: 81300450) and has been performed in accordance with the ethical standards as described in the 1964 Declaration of Helsinki and its later amendments or comparable ethical standards. All patients were provided with informed written consent regarding the data collection and publication.
: We obtained written permission from all patients in the study to publish the manuscript reporting individual patient data.
: The authors declare that they have no competing interests.
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