Funding for this research was provided by:
The National Key Research and Development Program of China Stem Cell and Translational Research (2017YFA0105102)
Key Field Research and Development Program of Guangdong province (2018B0300337001)
Text and Data Mining valid from 2019-05-02
Received: 5 March 2019
Accepted: 26 April 2019
First Online: 2 May 2019
Ethics approval and consent to participate
: Not applicable.
: All authors have read the manuscript and indicated consent for publication.
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.