A 2-year follow-up after a 2-year RCT with vitamin D and exercise:

Uusi-Rasi K, Patil R, Karinkanta S, Kannus P,  Tokola K, Lamberg-Allardt C, Sievänen H. A 2-year follow-up after a 2-year RCT with vitamin D and exercise: Effects on falls, injurious falls and physical functioning among older women. Journals of Gerontology. A. Medical Sciences 2017;72(9):1239-1245. doi.org/10.1093/gerona/glx044