1. Medicinal properties of Echinacea;Barrett;Phytomedicine,2003
2. Immunomodulating activity of Echinacea gloriosa L., Echinacea angustifolia DC., and Rudbeckia speciosa Wenderoth ethanol–water extracts;Bukovsky;pol. J. Pharmacol.,1995
3. The antitumor effects of levamisole in mice are mediated by NC-1.1+ cells;Clarke;Cancer Immunol. Immunother.,1997
4. Risk of drug-induced congenital defects;De santis;Eur. J. Obestet. Gynecol. Reprod. Biol.,2004
5. Teratology: general considerations and principles;Finell;J. Allerg. Clin. Immunol.,1999