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Cytotoxicity of JFK-containing serums. The EPCs were cultured with no addition (control), blank serum (BS), and JFK-1, JFK-2, and JFK-3. JFK-1, JFK-2, and JFK-3 represented the serums prepared from rats by oral administration of JFK at doses of 1.8, 3.6, and 7.2 g/kg, respectively, and 10% (v/v) of the serums were used.
