Funding for this research was provided by:
Capital Science and Technology Leading Talent Project (Z181100006318007)
Text and Data Mining valid from 2019-11-01
Received: 14 July 2019
Accepted: 15 October 2019
First Online: 1 November 2019
Compliance with ethical standards
: The authors declare that they have no competing interests.
: This study was approved by the Research Ethics Committee of Beijing Chaoyang Hospital (China). Each enrolled patient provided written informed consent.