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Figure 1 Representative dot blot flow cytometric analysis of the mobilized endothelial progenitor cells/lymphocytes, quantifying the number of CD34⁺ and AC133⁺ cells in the older (>69 years) and younger patients (<62 years) preoperatively (c, d) and 6 h after surgery (e, f), together with isotype control of older (a) and younger patients (b). APC = allophycocyanin; FITC = fluorescein isothiocyanate.