Article History
Received: 9 March 2019
Accepted: 31 July 2019
First Online: 27 August 2019
Compliance with Ethical Standards
: This study was conducted according to the guidelines of the Declaration of Helsinki (2008), and all procedures involving animals were approved by the animal welfare committee of the Institute of Special Animals and Plant Science, Chinese Academy of Agricultural Science (Jilin, Jilin Province, China) from May 12, 2015 to July 22, 2015(Protocol no. 2015ISAP0620).
: The authors declare that they have no conflict of interest.