2Holick MF, Vitamin D : Photobiology, Metabolism, etc., In " Primer on the Metabolic Bone Diseases and Disorders of Mineral Motabolism ", American Society for Bone and Mineral Research[M]3rd Ed. Lippincott Raven, Philadelphia, 1996.74 - 81.
3Dawson-Hughes B, Heaney RP, Holick MF, et al. Estimates of optimal vi- tanfin D status[J]. Osteopoms Int,2005,16:713.
6Stein EM, Laing EM, Hall DB, et al. Serum 25-hydroxyvitamin D concentrations in girls aged 4-8 Y living in the southeastem United States[J]. Am J Clin Nutr,2006,83:75.
7Holick MF, Chen TC. Vitamin D deficiency: a worldwide problem with health .consequences [ J ]. Am J Clin Nutr, 2008,87 Suppl: S 1080.
7Dawson-Hughes B, Heaney RP, Holick MF, et al. Esti- mates of optimal vitamin D status[J-]. Osteoporos Int, 2005,16(7) : 713-716.
8Stein EM, Laing EM, Hall DB, et al. Serum 25-hydroxyvi- tamin D concentrations in girls aged 4-8 y living in the southeastern United States[J]. Am J Clin Nutr, 2006,83 (1) :75-81.
10Meguid NA,Hashish AF,Anwar M,et al. Reduced serum levels of 25-hydroxy and 1,25 -dihydroxy vitamin D in Egyptian children with autism[J]. J Ahem Complement Med,2010, 16(6):641-645.
