Turner, M., P. E. Barre, A. Benjamin, D. Goltzman and M. Gascon-Barre. 1988. Does the maternal kidney contribute to the increased circulating 1,25-dihydroxyvitamin D concentrations during pregnancy? Mineral and Electrolyte Metabolism 14(4): 246-52.

Tzotzas, T., F. G. Papadopoulou, K. Tziomalos, S. Karras, K. Gastaris, P. Perros and G. E. Krassas. 2010. Rising serum 25-hydroxy-vitamin D levels after weight loss in obese women correlate with improvement in insulin resistance. Journal of Clinical Endocrinology and Metabolism 95(9): 4251-7.

Urushino, N., K. Yasuda, S. Ikushiro, M. Kamakura, M. Ohta and T. Sakaki. 2009. Metabolism of 1alpha,25-dihydroxyvitamin D₂ by human CYP24A1. Biochemical and Biophysical Research Communications 384(2): 144-8.

Valderas, J. P., S. Velasco, S. Solari, Y. Liberona, P. Viviani, A. Maiz, A. Escalona and G. Gonzalez. 2009. Increase of bone resorption and the parathyroid hormone in post-menopausal women in the long-term after Roux-en-Y gastric bypass. Obesity Surgery 19(8): 1132-8.

van der Mei, I. A., A. L. Ponsonby, O. Engelsen, J. A. Pasco, J. J. McGrath, D. W. Eyles, L. Blizzard, T. Dwyer, R. Lucas and G. Jones. 2007. The high prevalence of vitamin D insufficiency across Australian populations is only partly explained by season and latitude. Environmental Health Perspectives 115(8): 1132-9.

van Dijk, C. E., M. R. de Boer, L. L. Koppes, J. C. Roos, P. Lips and J. W. Twisk. 2009. Positive association between the course of vitamin D intake and bone mineral density at 36 years in men. Bone 44(3): 437-41.

Vieth, R. 1990. The mechanisms of vitamin D toxicity. Bone and Mineral 11(3): 267-72.

Vieth, R. 2004. Why the optimal requirement for vitamin D₃ is probably much higher than what is officially recommended for adults. Journal of Steroid Biochemistry and Molecular Biology 89-90(1-5): 575-9.

Wang, L., J. N. Flanagan, L. W. Whitlatch, D. P. Jamieson, M. F. Holick and T. C. Chen. 2004. Regulation of 25-hydroxyvitamin D-1alpha-hydroxylase by epidermal growth factor in prostate cells. Journal of Steroid Biochemistry and Molecular Biology 89-90(1-5): 127-30.

Wang, T. J., F. Zhang, J. B. Richards, B. Kestenbaum, J. B. van Meurs, D. Berry, D. P. Kiel, E. A. Streeten, C. Ohlsson, D. L. Koller, L. Peltonen, J. D. Cooper, P. F. O’Reilly, D. K. Houston, N. L. Glazer, L. Vandenput, M. Peacock, J. Shi, F. Rivadeneira, M. I. McCarthy, P. Anneli, I. H. de Boer, M. Mangino, B. Kato, D. J. Smyth, S. L. Booth, P. F. Jacques, G. L. Burke, M. Goodarzi, C. L. Cheung, M. Wolf, K. Rice, D. Goltzman, N. Hidiroglou, M. Ladouceur, N. J. Wareham, L. J. Hocking, D. Hart, N. K. Arden, C. Cooper, S. Malik, W. D. Fraser, A. L. Hartikainen, G. Zhai, H. M. Macdonald, N. G. Forouhi, R. J. Loos, D. M. Reid, A. Hakim, E. Dennison, Y. Liu, C. Power, H. E. Stevens, L. Jaana, R. S. Vasan, N. Soranzo, J. Bojunga, B. M. Psaty, M. Lorentzon, T. Foroud, T. B. Harris, A. Hofman, J. O. Jansson, J. A. Cauley, A. G. Uitterlinden, Q. Gibson, M. R. Jarvelin, D. Karasik, D. S. Siscovick, M. J. Econs, S. B. Kritchevsky, J. C. Florez, J. A. Todd, J. Dupuis, E. Hypponen and T. D. Spector. 2010. Common genetic determinants of vitamin D insufficiency: a genome-wide association study. Lancet 376(9736): 180-8.

Ward, L. M., I. Gaboury, M. Ladhani and S. Zlotkin. 2007. Vitamin D-deficiency rickets among children in Canada. Canadian Medical Association Journal 177(2): 161-6.

Wastney, M. E., J. Ng, D. Smith, B. R. Martin, M. Peacock and C. M. Weaver. 1996. Differences in calcium kinetics between adolescent girls and young women. American Journal of Physiology 271(1 Pt 2): R208-16.

Webb, A. R., L. Kline and M. F. Holick. 1988. Influence of season and latitude on the cutaneous synthesis of vitamin D₃: exposure to winter sunlight in Boston and Edmonton will not promote vitamin D₃ synthesis in human skin. Journal of Clinical Endocrinology and Metabolism 67(2): 373-8.