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Prevention of depression and poor physical function in older persons with vitamin D supplementation

Primary objectives: 1. Does vitamin D supplementation improve depressive symptoms in older persons? 2. Does vitamin D supplementation improve physical performance and functional limitations in older persons?Secondary objectives: 3. Does vitamin D…

Placebo-controlled double-blind randomized controlled trial investigating vitamin K supplementation on vascular calcification propensity in vitamin K deficient renal transplant recipients

To study the effect of vitamin K supplementation on calcification propensity and vitamin K status in RTRs with vitamin K deficiency.