Funding for this research was provided by:
National Natural Science Foundation of China (81902303, 81902558, 81672234)
Science and Technology Planning Project of Shenzhen Municipality (GJHZ20180416164801042, 201606018, JCYJ20180305124912336)
Text and Data Mining valid from 2020-03-12
Received: 6 January 2020
Accepted: 5 March 2020
First Online: 12 March 2020
: The authors declare that they have no competing interests.