Hoelzer, K, Bielke, L, Blake, D P, Cox, E, Cutting, S M, Devriendt, B, Erlacher-Vindel, E, Goossens, E, Karaca, K, Lemiere, S, Metzner, M, Raicek, M, Collell Suriñach, M, Wong, N M, Gay, C, Van Immerseel, F, "Vaccines as alternatives to antibiotics for food producing animals. Part 1: challenges and needs", BMC Veterinary Research, 2018