Funding for this research was provided by:
Course research fee of Jichi Medical University
Received: 31 December 2018
Accepted: 20 February 2019
First Online: 4 March 2019
Ethics approval and consent to participate
: Animal experiments were performed after receiving approval from the Institutional Animal Experiment Committee of the Jichi Medical University (17063-01), in accordance with the Institutional Regulations for Animal Experiments and Fundamental Guidelines for the Proper Conduct of Animal Experiments and Related Activities in Academic Research Institutions under the jurisdiction of the Ministry of Education, Culture, Sports, Science and Technology.
: Not applicable.
: The authors declare that they have no competing interests.
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