The Association between Seasonal Variation in Vitamin D, Postural Sway, and Falls Risk: An Observational Cohort Study.
Bird ML, Hill KD, Robertson I, Ball MJ, Pittaway JK, Williams AD. The Association between Seasonal Variation in Vitamin D, Postural Sway, and Falls Risk: An Observational Cohort Study. J Aging Res. 2013; 2013:751310.