A randomized, controlled pilot study of the effects of vitamin D supplementation on balance in Parkinson's disease: Does age matter?
Amie L HillerCharles F MurchisonBrenna M LobbSusan O'ConnorMorgan O'ConnorJoseph F QuinnPublished in: PloS one (2018)
ClinicalTrials.gov: NCT01119131.
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