Correction: Genetic characterization and pathogenicity of two Recombinant PRRSV-2 strains from lineages 1, 3, 5, and 8 emerged in China - Chunhua Wei; Chen Liu; Guangsong Chen; Yuan Yang; Jiarui Li; Huijuan Dan; Ailing Dai; Cuiqin Huang; Manlin Luo; Jiankui Liu (BMC Veterinary Research)