Xu, K. ., Zhao, Q. ., Wen, X. ., Wu, R. ., Wen, Y. ., Huang, X. ., … Cao, S. . A trivalent Apx-fusion protein delivered by E. coli outer membrane vesicles induce protection against Actinobacillus pleuropneumoniae of serotype 1 and 7 challenge in a murine model. PloS One, 13(1), e0191286. https://doi.org/10.1371/journal.pone.0191286 (Original work published 2018)