Environmental enrichment affects immunity and reduces disease severity in pigs after co-infection, with stronger effects when applied from birth than from weaning - de Bruijn, Brigitte G. C.; van Dixhoorn, Ingrid Danielle Ellen; Bolhuis, J. Elizabeth; Cornelissen, Jan B. W. J.; Stockhofe-Zurwieden, Norbert; Kluivers, Marion; Rebel, Johanna M. J. (Frontiers in Veterinary Science, 2024)