Province Key Laboratory of Animal Resource and Epidemic Disease Prevention, Liaoning University, Shenyang, China.|Province Key Laboratory of Animal Resource and Epidemic Disease Prevention, Liaoning University, Shenyang, China.|Province Key Laboratory of Animal Resource and Epidemic Disease Prevention, Liaoning University, Shenyang, China.|Province Key Laboratory of Animal Resource and Epidemic Disease Prevention, Liaoning University, Shenyang, China.|Province Key Laboratory of Animal Resource and Epidemic Disease Prevention, Liaoning University, Shenyang, China.|Province Key Laboratory of Animal Resource and Epidemic Disease Prevention, Liaoning University, Shenyang, China.|Province Key Laboratory of Animal Resource and Epidemic Disease Prevention, Liaoning University, Shenyang, China.|Province Key Laboratory of Animal Resource and Epidemic Disease Prevention, Liaoning University, Shenyang, China.|Province Key Laboratory of Animal Resource and Epidemic Disease Prevention, Liaoning University, Shenyang, China.