1Berger M M,Shenkin A.Vitamins and trace elements:practical aspects of supplementation[J].Nutrition,2006,22(9):952-955.
2Gurusamy K,Davidson B R.Trace element concentration in metastic liver disease.A systematic review[J].J Trace Elements Med Biol,2007,21:169-177.
3Farquharson M J,Geraki K,Falkenberg G,et al.The localisation and micro-mapping of copper and other trace elements in breast tumours using a synchrotron micro-XRF system[J].Appl Radiat Isot,2007,65(2):183-188.
5Daftsis E J,Zachariadis G A.Analytical performance of a multi-element ICP-AES method for Cd,Co,Cr,Cu,Mn,Ni and Pb determination in blood fraction samples[J].Microchim Acta,2008,160(4):405-411.
6Bianchi F,Maffini M,Mangia A,et al.Experimental design optimization for the ICP-AES determination of Li,Na,K,Al,Fe,Mn and Zn in human serum[J].J Pharm Biomed Anal,2007,43(2):659-665.
1ROSEN CJ. Clinical practice. Vitamin D insufficiency [ J~ . N Engl J Med, 2011,364:248-254.
2FLORES M, MACIAS N, LOZADA A, et al. Serum 25- hydroxyvitamin D levels among Mexican children ages 2y to 12y: A national survey [Jl ~ Nutrition, 2013, 29 (5) : 802 -804.
3Wacker M, Holiek M. F. Vitamin D-effects on skeletal and ex-traskeletal health and the need for supplementation [J] . Nu- trients, 2013,5 : 111-148.
4Shin YH, Shin HJ, Lee YJ. Vitamin D status and childhood health [J] . Korean J Pediatr, 2013,56(10) :417-423.
5Hassanali Vatanparast, Christine Nisbet, Brian Gushulak, et al. Vitamin D Insufficiency and Bone Mineral Status in a Pop- ulation of Newcomer Children in Canada [J] . 2013,5 (5): 1561-1572.
6Whiting S.J., Langlois K.A., Vatanparast H., Greene- Finestone L. S. The vitamin D status of Canadians relative to the 2011 Dietary Reference Intakes: An examination in chil- dren and adults with and without supplement use [J] . Am. J. Clin. Nutr, 2011,94 : 128-135.
7Hambidge KM, Miller LV, Krebs NF. Physiological require- ments for zinc [J] . Int J Vitam Nutr Res, 2011,81 ( 1 ) :72- 78.
