1. Key Laboratory of Ministry of Education for Conservation and Utilization of Special Biological Resources in Western China, Ningxia University, Yinchuan, China
2. College of Agriculture, Ningxia University, Yinchuan, China
3. Key Laboratory of Infection and Immunity of Shandong Province & Department of Immunology, School of Biomedical Sciences, Shandong University, Jinan, China
4. College of Life Science, Ningxia University, Yinchuan, China