1. Department of Preventive Veterinary MedicineCollege of Veterinary MedicineChina Agricultural University2 Yuanmingyuan Road WestBeijing 100193People's Republic of China
2. Inner Mongolia Saikexing Reproductive Biotechnology Co. Ltd., Inner Mongolia University College of Life SciencesShengle Economic District, Helin GeerHuhhotInner Mongolia 011517People's Republic of China