LR3 IGF 1 (Human), Recombinant Protein, CHO, Tag Free IGF 1 SDS , IGFBP 3 SDS , and the IGF 1 to IGFBP3 Ratio SDS at Download Table RUO Recombinant Human IGF 1 LR3 Protein Table 1 from Serum concentrations of insulin like growth factor (IGF) 1 and IGF binding protein 3 (IGFBP 3), IGF 1 IGFBP 3 ratio, and markers of bone turnover: reference values for French children and adolescents and z score comparability