1. College of Food Science and Engineering, Northwest A&F University, Yangling, 712100, Shaanxi, P. R. China
2. School
of Medicine, Xi’an Jiaotong University, Xi’an, 710061, Shaanxi, P. R. China
3. Northwest
Institute of Plateau Biology, Chinese Academy of Sciences, Xining, 810008, Qinghai, P. R. China