Funding for this research was provided by:
National Natural Science Foundation of China (31570890, 31770961)
Wu Jieping Medical Foundation (320.6750.14286)
Text and Data Mining valid from 2018-05-09
Received: 20 November 2017
Accepted: 26 April 2018
First Online: 9 May 2018
Ethics approval and consent to participate
: This study was approved by the Ethics Committees of Beijing Chao-Yang Hospital of Capital Medical University (No. 2009–4). All patients were willing to participate and provided written informed consent.
: The authors declare that they have no competing interests.
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