Funding for this research was provided by:
Beijing Municipal Science and Technology Commission (Z181100001718148)
Text and Data Mining valid from 2019-02-07
Received: 27 September 2018
Accepted: 4 January 2019
First Online: 7 February 2019
Compliance with ethical standards
: The authors declare no potential conflicts of interest.
: The study was approved by the IRB in Beijing Tsinghua Chang-gung Hospital.