The 24,25 to 25-hydroxyvitamin D ratio and fracture risk in older adults: The cardiovascular health study.
Ginsberg C, Katz R, de Boer IH, Kestenbaum BR, Chonchol M, Shlipak MG, Sarnak MJ, Hoofnagle AN, Rifkin DE, Garimella PS, Ix JH. The 24,25 to 25-hydroxyvitamin D ratio and fracture risk in older adults: The cardiovascular health study. Bone. 2018 02; 107:124-130.