1. Eastern Oregon Agricultural Research Center, Oregon State University, Burns, OR
2. School of Veterinary Medicine and Animal Science, São Paulo State University (UNESP), Botucatu, Brazil
3. Department of Animal Science, Texas A&M University, College Station, TX
4. Programa de Pós-Graduação em Zootecnia/Faculdade de Medicina Veterinária e Zootecnia, UNESP - Univ. Estadual Paulista, Botucatu, SP, Brazil