Figure 1From: Diurnal variation of phenylalanine and tyrosine concentrations in adult patients with phenylketonuria: subcutaneous microdialysis is no adequate tool for the determination of amino acid concentrations Schedule of the study visit. Schedule of the study visit with meals and optional snacks at fixed times and bicycle ergometry at either 9.15 pm or 10.15 pm. The sequence of drawing blood samples (for serum and dried blood specimens) and the sequence of sampling microdialysis fluid (MD fluid) are displayed as coloured dots.Back to article page