A proprietary extract from the echinacea plant (Echinacea purpurea) enhances systemic immune response during a common cold
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Jan V Slama | Chuck C. Chang | R. Bauer | R. Gahler | L. Goonewardene | V. Goel | T. Basu | R. Barton | R. Lovlin | Chuck Chang | Richard E. Barton