参考文献
1. Bischoff SC, Austin P, Boeykens K, et al. ESPEN guideline on home enteral nutrition. Clin Nutr. 2020;39(1):5-222. Duffy SK, Kelly AK, Rajauria G, et al. The use of synthetic and natural vitamin D sources in pig diets to improve meat quality and vitamin D content. Meat Sci. 2018;143:60-68