1. Department of Animal Science, Federal University of Minas Gerais (UFMG), Belo Horizonte, Brazil
2. Department of Animal Science, University of Wisconsin, Madison, WI, USA
3. Schothorst Feed Research, Lelystad, Netherlands
4. Department of Animal Science, Federal University of Rio Grande do Sul, Porto Alegre, Brazil
5. Brazilian Agricultural Research Corporation – Embrapa Dairy Cattle, Juiz de Fora, Brazil