1. Vitamin D Research Institute, College of Bioscience and Bioengineering, Shaanxi University of Technology, Hanzhong 723000 Shaanxi, China
2. College of Food Science and Engineering, Northwest A&F University, Yangling 712100 Shaanxi, China
3. Shaanxi Key Laboratory of Bioresource, College of Bioscience and Bioengineering, Shaanxi University of Technology, Hanzhong 723001 Shaanxi, China