Figure 2From: Proxy markers of serum retinol concentration, used alone and in combination, to assess population vitamin A status in Kenyan children: a cross-sectional studyAssociations of four proxy markers with serum retinol concentration (HPLC). A: RBP, B: transthyretin, C: RBP:transthyretin molar ratio, D: retinol by fluorescence.Back to article page