Vitamin D3 supplementation has no effect on conventional cardiovascular risk factors: a parallel-group, double-blind, placebo-controlled RCT - Wood, A D; Secombes, K R; Thies, F; Aucott, L; Black, A J; Mavroeidi, A; Simpson, W G; Fraser, W D; Reid, D M; Macdonald, H M (J Clin Endocrinol Metab, 2012)