Text and Data Mining valid from 2020-01-22
Received: 19 August 2019
Revised: 8 October 2019
Accepted: 14 October 2019
First Online: 22 January 2020
Compliance with Ethics Guidelines
: The authors Jie Ren, Kai Song, Chao Deng, Nathan A. Ahlgren, Jed A. Fuhrman, Yi Li, Xiaohui Xie, Ryan Poplin and Fengzhu Sun declare that they have no conflicts of interest.
: All procedures performed in studies were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.