Funding for this research was provided by:
National Natural Science Foundation of China (31772505, 31572302)
Text and Data Mining valid from 2019-01-30
Received: 18 September 2018
Revised: 18 December 2018
Accepted: 2 January 2019
First Online: 30 January 2019
Compliance with ethical standards
: The authors declare that they have no conflict of interest.
: We neither used endangered species nor were the investigated animals collected in protected areas. All applicable international, national, and institutional guidelines for the care and use of animals were followed.
: Informed consent was obtained from all individual participants included in the study.