Yamaguchi, Emi
Hayama, Yoko
Shimizu, Yumiko
Murato, Yoshinori
Sawai, Kotaro
Yamamoto, Takehisa
Funding for this research was provided by:
Japan Society for the Promotion of Science (18K14572)
Article History
Received: 21 April 2021
Accepted: 2 September 2021
First Online: 23 November 2021
Declarations
:
: Ethical approval forthis study was waived by the Animal Ethical Committee of Animal ResearchCenter, Hokkaido Research Organization, because it did not include anyexperimental research on animals. All data were collected with permission fromthe owners of nursery farms and private dairy farms.
: Not applicable.
: The authors declare that they have no conflict of interests.