Funding for this research was provided by:
National Natural Science Foundation of China (81371292)
"13th Five-Year Plan" National Science and Technology supporting plan (2015BAI12B04)
Text and Data Mining valid from 2018-10-17
Received: 25 June 2018
Revised: 4 October 2018
Accepted: 10 October 2018
First Online: 17 October 2018
Compliance with ethical standards
: The authors declare that they have no conflict of interest.
: All patients/legally authorized representative gave their informed consent (including consent to publish) before their inclusion to this study.
: This study was approved by the Research Ethics Board of Beijing Tiantan Hospital, Capital Medical University.