Guan, Ran
Zhou, Xingdong
Cai, Hongbo
Qian, Xiaorui
Xin, Xiaoyu
Li, Xiaowen
Article History
Received: 29 January 2022
Accepted: 8 March 2022
First Online: 14 March 2022
Declarations
:
: All data in this study came from the internal data management system, and the author had access rights. The study only involved statistical analysis of the data, without field investigation of pig farms.
: Not applicable.
: The authors declare no conflicts of interest.