Optimizing Combinations of Flavonoids Deriving from Astragali Radix in Activating the Regulatory Element of Erythropoietin by a Feedback System Control Scheme

<table>Combination index of the 60 trial combinations. The combination indexes (CIs) &lt; 1, = 1, and &gt; 1 indicate synergism, additive effect, and antagonism, respectively. The calculation of CI was accord with the theory of Chou. Sixty combinations out of 5 five iterations are shown here. The 16th and 18th combinations (black bars) showed the strongest synergism, that is, the smallest CI value. </table>

Evidence-Based Complementary and Alternative Medicine

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Figure 6

Figure 6: Optimizing Combinations of Flavonoids Deriving from Astragali Radix in Activating the Regulatory Element of Erythropoietin by a Feedback System Control Scheme 

Figure 6 | Optimizing Combinations of Flavonoids Deriving from Astragali Radix in Activating the Regulatory Element of Erythropoietin by a Feedback System Control Scheme 