Treatment of the Common Cold with Unrefined Echinacea

Figure 2. The dotted line represents the echinacea group; the solid line represents the placebo group.
Figure 2. The dotted line represents the echinacea group; the solid line represents the placebo group. Illness duration.

This Article

  1. Ann Intern Med December 17, 2002 vol. 137 no. 12 939-946
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