Shen, Ying
Chao, Bao-Hua
Cao, Lei
Tu, Wen-Jun
Wang, Long-De
Article History
Received: 1 July 2019
Revised: 16 August 2019
Accepted: 19 August 2019
First Online: 8 September 2019
Compliance with Ethical Standards
:
: The authors declare that they have no conflict 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.
: This study was approved by the institutional review board of Capital Medical University Xuanwu Hospital, with waiver for informed consent.
: The funding organizations had no role in the design and concept of the study; the collection, management, analysis, and interpretation of the data; or the preparation, review, or approval of the manuscript.