Funding for this research was provided by:
National High-Tech R & D Program of China (2015AA033602)
1351 Personnel Training Program of Beijing Chao-Yang Hospital Affiliated to Capital Medical University (CYXZ-2017-09)
Text and Data Mining valid from 2018-12-01
Received: 17 October 2018
Accepted: 14 December 2018
First Online: 27 December 2018
Ethics approval and consent to participate
: This study was approved by the Ethics Committee of Beijing Chao-Yang Hospital, Capital Medical University and conducted in accordance with the ethical standards formulated in the Declaration of Helsinki. Written informed consent was obtained from all patients.
: Not applicable.
: The authors declare that they have no competing interests.
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