1. Department of Animal Science, University of Nebraska–Lincoln, Lincoln, NE 68583, USA
2. Department of Animal Science, New Mexico State University, Las Cruces, NM 88003, USA
3. Department of Animal Production, School of Agriculture, University of Jordan, Amman 11942, Jordan
4. Olson Center for Women's Health, Department of Obstetrics and Gynecology, University of Nebraska Medical Center, Omaha, NE 68198, USA
5. VA Nebraska-Western Iowa Health Care System, Omaha, NE 68105, USA