OPEN PLoS medicine | 26 Aug 2015
LE Mokry, S Ross, OS Ahmad, V Forgetta, GD Smith, A Leong, CM Greenwood, G Thanassoulis and JB Richards
Observational studies have demonstrated an association between decreased vitamin D level and risk of multiple sclerosis (MS); however, it remains unclear whether this relationship is causal. We undertook a Mendelian randomization (MR) study to evaluate whether genetically lowered vitamin D level influences the risk of MS.
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