1. Shandong Provincial Key Laboratory of Animal Biotochnology and Disease Control and Prevention, College of Animal Science and Technology, Shandong Agricultural University, Tai’an, China
2. Liaocheng Research Institute of Donkey High-Efficiency Breeding and Ecological Feeding, Liaocheng University, Liaocheng, China
3. National Engineering Research Center for Gelatin-based Traditional Chinese Medicine, Dong-E-E-Jiao Co. Ltd, Liaocheng, China