4Holick MF. Vitamin D:importance in the prevention of cancers, type 1 di- abetes,heart disease, and osteoporosis. Am J Clin Nutr, 2004,79 : 362- 371.
5Dusso AS, Brown AJ, Slatopolsky E. Vitamin D. Am J Physiol Renal Physio1,2005 ,289 :8-28.
6Holick MF. The Vitamin D deficiency pandemic and consequences for nonskeletal health : mechanisms of action. Mol Aspects Med, 2008,29 : 361-368.
7Tangpricha V, Spina C, Yao M, et al. Vitamin D deficiency enhances the growth of MC-26 colon cancer xenografts in Balb/c mice. J Nutr,2005, 135:2350-2354.