〇Michael Bolton¹, Danelle Bickett-Weddle², Paula Ospina³, Stephanie Meyers¹, Jamie Jonker⁴, Geert Vertenten⁵ (1. MSD Animal Health, De Soto, KS, USA, 2. Center for Food Security and Public Health, Iowa State University, USA, 3. Quality Milk Production Services, Cornell University, USA, 4. Sustainability & Scientific Affairs, National Milk Producers Federation, Arlington, VA, USA, 5. MSD Animal Health, Boxmeer, The Netherlands)