Determinants of plasma 25-hydroxyvitamin D and development of prediction models in three US cohorts.
Bertrand KA, Giovannucci E, Liu Y, Malspeis S, Eliassen AH, Wu K, Holmes MD, Laden F, Feskanich D. Determinants of plasma 25-hydroxyvitamin D and development of prediction models in three US cohorts. Br J Nutr. 2012 Nov 28; 108(10):1889-96.