1. Department of Animal Science, The Pennsylvania State University, University Park 16802
2. The Ohio State University, Columbus 43210
3. Wageningen University, 6700 AH Wageningen, The Netherlands
4. University of California–Davis, Davis 95616
5. DairyNZ, Hamilton 3240, New Zealand
6. Agriculture and Consumer Protection Department, Food and Agriculture Organization of the United Nations, 00153 Rome, Italy
7. Department of Animal Sciences, University of Florida, Gainesville 32608
8. Agriculture and Agri-Food Canada, Lethbridge AB T1J 4B1, Canada
9. Innovation Center for U.S. Dairy, Rosemont, IL 60018