Dose-related effects of vitamin D on immune responses in patients with clinically isolated syndrome and healthy control participants: study protocol for an exploratory randomized double- blind placebo-controlled trial.
O Connell K, Kelly S, Kinsella K, Jordan S, Kenny O, Murphy D, Heffernan E, O Laoide R, O Shea D, McKenna C, et al.
Trials. 2013 Aug 27; 14(1):272. Epub 2013 Aug 27. PMID: 23981773.Abstract