Cite
MLA Citation
Armin Zittermann et al.. “Effect of Vitamin D or Activated Vitamin D on Circulating 1, 25-Dihydroxyvitamin D Concentrations: A Systematic Review and Metaanalysis of Randomized Controlled Trials.” Clinical chemistry, vol. 61, 2015, pp. 1484–1494. http://access.bl.uk/ark:/81055/vdc_100117132265.0x000056