Funding for this research was provided by:
Natural Science Foundation of Fujian Province (2019J01804)
Received: 17 December 2020
Accepted: 3 March 2021
First Online: 12 March 2021
: The study involves analyses of left-over serum samples that were collected for diagnostic purposes, and no ethical approval was needed. All horse owners gave their informed written consent. The study was performed in accordance with national animal welfare regulations (SJVFS 2015:38).
: Not applicable.
: The authors declare that they have no competing interests.