1. College of Animal Sciences and Technology, Northwest A&F University, Yangling, China, 712100
2. Department of Human Anatomy, Medical College of Qinghai University Xining 810000, China
3. Department of Respiratory, the fourth People's Hospital of Qinghai Province, China 810000
4. Poultry Department, Faculty of Agriculture, Zagazig University, 44511 Zagazig, Egypt
5. Medical College of Qinghai University Xining 810000 China
6. Faculty of Veterinary and Animal Sciences, Lasbela University of Agriculture, Water and Marine Sciences, Uthal, Balochistan, Pakistan 3800
7. Institute of Animal and Dairy Sciences, Faculty of Animal Husbandry, University of Agriculture Faisalabad, Pakistan