Urine C-peptide creatinine ratio is an alternative to stimulated serum C-peptide measurement in late-onset, insulin-treated diabetes

A. G. Jones, R. E. J. Besser, T. J. McDonald, B. M. Shields, S. V. Hope, P. Bowman, R. A. Oram, B. A. Knight and A. T. Hattersley

Diabetic Medicine 28 ( 9 ): 1034 - 1038 , 2011