ShahN., BernardiniJ., PirainoB.Prevalence and correction of 25(OH) vitamin D deficiency in peritoneal dialysis patients.Perit Dial Int2005; 25: 362–6.
2.
MacLaughlinJ., HolickM.F.Aging decreases the capacity of human skin to produce vitamin D3.J Clin Invest1985; 76: 1536–8.
3.
WortsmanJ., MatsuokaL.Y., ChenT.C., HolickM.F.Decreased bioavailability of vitamin D in obesity.Am J Clin Nutr2000; 72: 690–3.
4.
ProsserD.E., JonesG.Enzymes involved in the activation and inactivation of vitamin D.Trends Biochem Sci2004; 29: 664–73.
5.
WillnowT.E., NykjaerA.Pathways for kidney-specific uptake of the steroid hormone 25-hydroxyvitamin D3.Curr Opin Lipidol2002; 13: 255–60.
6.
Wu-WongJ.R., TianJ., GoltzmanD.Vitamin D analogs as therapeutic agents: A clinical study update.Curr Opin Investig Drugs2004; 5: 320–6.
7.
TrangH.M., ColeD.E.C., RubinL.A., PierratosA., SiuS., ViethR.Evidence that vitamin D3 increases serum 25-hydroxyvitamin D more efficiently than does vitamin D2.Am J Clin Nutr1998; 68: 854–8.
8.
ViethR., LadakY., WalfishP.G.Age-related changes in the 25-hydroxyvitamin D versus parathyroid hormone relationship suggest a different reason why older adults require more vitamin D.J Clin Endocrinol Metab2003; 88: 185–91.
9.
SegerstenU., CorreaP., HewisonM., HellmanP., DralleH., CarlingT.25-hydroxyvitamin D(3)-1alpha-hydroxylase expression in normal and pathological parathyroid glands.J Clin Endocrinol Metab2002; 87: 2967–72.
CarterG.D., CarterR., JonesJ., BerryJ.How accurate are assays for 25 hydroxyvitamin D? Data from the international Vitamin D External Quality Assessment Scheme (DEQAS).Clin Chem2004; 50: 2195–7.
12.
BinkleyN., KruegerD., CowgillC.S., PlumL., LakeE., HansenK.E.Assay variation confounds the diagnosis of hypovitaminosis D: A call for standardization.J Clin Endocrinol Metab2004; 89: 3152–7.
13.
Bischoff-FerrariH.A., DietrichT., OravE.J., Dawson-HughesB.Positive association between 25-hydroxyvitamin D levels and bone mineral density: A population-based study of younger and older adults.Am J Med2004; 116: 634–9.
14.
KinyamuH.K., GallacherJ.C., RaffertyK.A., BalhornK.E.Dietary calcium and vitamin D intake in elderly women: Effect on serum parathyroid hormone and vitamin D metabolites.Am J Clin Nutr1998; 67: 342–8.
15.
PorthouseJ., CockayneS., KingC., SaxonL., SteeleE., AsprayT.Randomised controlled trial of calcium and supplementation with cholecalciferol (vitamin D3) for prevention of fractures in primary care.Br Med J2005; 330: 1003–8.
16.
The RECORD Trial Group.Oral vitamin D3 and calcium for secondary prevention of low-trauma fractures in elderly people (Randomised Evaluation of Calcium Or vitamin D, RECORD): A randomized placebo-controlled trial.Lancet2005; 365: 1621–8.
17.
Bischoff-FerrariH.A., WilletW.C., WongJ.B., GiovannucciE., DietrichT., Dawson-HughesB.Fracture prevention with vitamin D supplementation: A meta-analysis of randomized controlled trials.JAMA2005; 293: 2257–64.
18.
ViethR.Vitamin D supplementation, 25 hydroxyvitamin D concentrations and safety.Am J Clin Nutr1999; 69: 842–56.
19.
PettiforJ.M., BikleD.D., CavalerosM., ZachenD., KamdarM.C., RossF.P.Serum levels of free 1,25-dihydroxyvitamin D in vitamin D toxicity.Ann Intern Med1995; 122: 511–13.
20.
CalvoM.S., WhitingS.J., BartonC.N.Vitamin D intake: A global perspective of current status.J Nutr2005; 135: 310–16.
21.
WhiteP., CookeN.The multifunctional properties and characteristics of vitamin D-binding protein.Trends Endocrinol Metab2000; 11: 320–7.
22.
KoenigK.G., LindbergJ.S., ZerwekhJ.E., PadalinoP.K., CushnerH.M., CopleyJ.B.Free and total 1,25-dihydroxyvitamin D levels in subjects with renal disease.Kidney Int1992; 41: 161–5.
23.
JoffeP., HeafJ.G.Vitamin D and vitamin D binding protein kinetics in patients treated with continuous ambulatory peritoneal dialysis.Perit Dial Int1989; 9: 281–4.
24.
LinC-Y, HaungT-P.Enhancement of ionized calcium and 1,25-dihydroxycholecalciferol loss from peritoneal fluid during peritonitis in patients treated with continuous ambulatory peritoneal dialysis.Nephron1991; 59: 90–5.
25.
HayesM.E., O'DonoghueD.J., BallardieF.W., MawerE.B.Peritonitis induces the synthesis of 1 alpha, 25-dihydroxyvitamin D3 in macrophages from CAPD patients.FEBS Lett1987; 17: 307–10.
26.
MoeS.M.Management of renal osteodystrophy in peritoneal dialysis patients.Perit Dial Int2004; 24: 209–16.
27.
TsukamotoY., WatanabeT., NakagamiT., MorishitaK.Effect of treatment with oral calcitriol on calcium metabolism and fasting serum 25(OH)- or 1,25(OH)2-vitamin D level in Japanese postmenopausal women.Endocr J2003; 50: 681–7.
28.
HalloranB.P., SchaeferP., LifschitzM., LevensM., GoldsmithR.S.Plasma vitamin D metabolite concentrations in chronic renal failure: Effect of oral administration of 25-hydroxyvitamin D3.J Clin Endocrinol Metab1984; 59: 1063–9.
29.
ShephardR.M., DelucaH.F.Plasma concentrations of vitamin D3 and its metabolites in the rat as influenced by vitamin D3 or 25-hydroxyvitamin D3 intakes.Arch Biochem Biophys1980; 202: 43–53.
30.
VenningG.Recent developments in vitamin D deficiency and muscle weakness among elderly people.Br Med J2005; 330: 524–6.
31.
National Kidney Foundation.K/DOQI clinical practice guidelines for bone metabolism and disease in chronic kidney disease.Am J Kidney Dis2003; 42(Suppl 3): S1–202.
32.
Vitamin D and health in the 21st century: Bone and beyond.Am J Clin Nutr2004; 80(6, Suppl): 1673S–1766S.
33.
CalvoM.S., WhitingS.J.Vitamin D insufficiency: A significant risk factor in chronic diseases and potential disease-specific biomarkers of vitamin D sufficiency.J Nutr2005; 135: 301–7.
34.
TengM., WolfM., OfsthunM.N., LazarusJ.M., HernanM.A., CamargoC.A.Jr.. Activated injectable vitamin D and hemodialysis survival: A historical cohort study.J Am Soc Nephrol2005; 16: 1115–25.