@article {ascherio2012serum,
	title = {Serum 25-hydroxyvitamin D concentrations among patients in BENEFIT predicts conversion to multiple sclerosis, MRI lesions, and brain volume loss},
	year = {2012},
	author = {Ascherio, A and Munger, K and Simon, C and Kappos, L and Polman, CH and Freedman, MS and Hartung, HP and Miller, DH and Montalban, X and Edan, G and others}
}
