Vitamin D in youth with Type 1 diabetes: prevalence of insufficiency and association with insulin resistance in the SEARCH Nutrition Ancillary Study

N. S. The, J. L. Crandell, J. M. Lawrence, I. B. King, D. Dabelea, S. M. Marcovina, R. B. D`Agostino Jr, J. M. Norris, C. Pihoker and E. J. Mayer-Davis

Diabetic Medicine 30 ( 11 ): 1324 - 1332 , 2013