Funding for this research was provided by:
Research Innovation Program for College Graduates of Hebei Province of China (CXZZBS2017096)
Received: 28 January 2019
Accepted: 17 May 2019
First Online: 13 June 2019
Ethical approval and consent to participate
: All of the experimental procedures were performed in strict accordance with the Guidelines on the Care and Use of Laboratory Animals as issued by the Chinese Council on Animal Research and Guidelines of Animal Care. The Ethics Committee of the Hebei Normal University (Shijiazhuang, Hebei, China) approved these experiments.
: Not applicable. This manuscript does not contain data from any individual person.
: The authors declare that they have no competing interests.