Comparison of the pathogenicity of porcine reproductive and respiratory syndrome virus (PRRSV)-1 and PRRSV-2 in pregnant sows - Chang-Gi Jeong; Salik Nazki; Seung-Chai Kim; Amina Khatun; Yun-Hee Noh; Dong-Uk Lee; Sang Chul Kang; Byoung-Joo Seo; Myeon-Sik Yang; Sim-In Lee; In-Joong Yoon; Bumseok Kim; et al. (Archives of Virology, 2022)