1. Department of Theriogenology Mansoura University Mansoura Egypt
2. Institute of Reproductive Biology University of Veterinary Medicine Hannover Hannover Germany
3. Department of Surgery, Anesthesiology and Radiology Faculty of Veterinary Medicine Mansoura University Mansoura Egypt
4. Division of Animal Science University of Missouri Columbia Missouri USA
5. OHVRI, Health and Veterinary Innovative Research and Development School of Veterinary Medicine Faculty of Agrarian Science Antioquia University Medellín Colombia
6. Departamento de Ciencia Animal Facultad de Ciencias Agropecuarias Universidad Nacional de Colombia Palmira Colombia