Ethical Statement
All procedures involved in sample collection from live animals were
conducted in accordance with the Guidelines for Animal Care and Use,
Hokkaido University, and were approved by the Animal Care and Use
Committee of the Graduate School of Veterinary Medicine, Hokkaido
University (Permit Number: 1106, 1151, 1152, 15009, 17005, 18-0083,
19-0021, and 20-0146).