1Lips, P. Vitamin D physiology. Prog Biophys Mol Biol 2006; 92(1): 4–8.
2Wacker, M, Holick, MF. Sunlight and vitamin D: a global perspective for health. Dermatoendocrinol 2013; 5(1): 51–108.
3Aspray, TJ, Bowring, C, Fraser, W, Gittoes, N, Javaid, MK, Macdonald, H, et al. National osteoporosis society vitamin D guideline summary. Age Ageing 2014; 43(5): 592–5.
4Bertone-Johnson, ER. Vitamin D and the occurrence of depression: causal association or circumstantial evidence? Nutr Rev 2009; 67(8): 481–92.
5DeLuca, GC, Kimball, SM, Kolasinski, J, Ramagopalan, SV, Ebers, GC. Review: the role of vitamin D in nervous system health and disease. Neuropathol Appl Neurobiol 2013; 39(5): 458–84.
6Berk, M, Jacka, FN, Williams, LJ, Ng, F, Dodd, S, Pasco, JA. Is this D vitamin to worry about? Vitamin D insufficiency in an inpatient sample. Aust N Z J Psychiatry 2008; 42(10): 874–8.
7Menkes, DB, Lancaster, K, Grant, M, Marsh, RW, Dean, P, du Toit, SA. Vitamin D status of psychiatric inpatients in New Zealand's Waikato region. BMC Psychiatry 2012; 12: 68.
8McCue, RE, Charles, RA, Orendain, GC, Joseph, MD, Abanishe, JO. Vitamin D deficiency among psychiatric inpatients. Prim Care Companion CNS Disord 2012; 14(2): 11m01230.
9Humble, MB, Gustafsson, S, Bejerot, S. Low serum levels of 25-hydroxyvitamin D (25-OHD) among psychiatric out-patients in Sweden: relations with season, age, ethnic origin and psychiatric diagnosis. J Steroid Biochem Mol Biol 2010; 121(1–2): 467–70.
10Bates, B, Lennox, A, Prentice, A, Bates, C, Page, P, Nicholson, S, et al. National Diet and Nutrition Survey Results from Years 1, 2, 3 and 4 (combined) of the Rolling Programme (2008/2009–2011/2012). Public Health England, Food Standards Agency, 2014.
11Humble, MB, Gustafsson, S, Bejerot, S. Low serum levels of 25-hydroxyvitamin D (25-OHD) among psychiatric out-patients in Sweden: relations with season, age, ethnic origin and psychiatric diagnosis. J Steroid Biochem Mol Biol 2010; 121(1–2): 467–70.
12Belvederi Murri, M, Respino, M, Masotti, M, Innamorati, M, Mondelli, V, Pariante, C, et al. Vitamin D and psychosis: mini meta-analysis. Schizophr Res 2013; 150(1): 235–9.
13Mavroeidi, A, O'Neill, F, Lee, PA, Darling, AL, Fraser, WD, Berry, JL, et al. Seasonal 25-hydroxyvitamin D changes in British postmenopausal women at 57 degrees N and 51 degrees N: a longitudinal study. J Steroid Biochem Mol Biol 2010; 121(1–2): 459–61.
14Heaney, RP. Functional indices of vitamin D status and ramifications of vitamin D deficiency. Am J Clin Nutr 2004; 80(Suppl 6): 1706S–9S.