[1] Ross SM. Echinacea purpurea: A Proprietary Extract of Echinacea purpurea Is Shown to be Safe and Effective in the Prevention of the Co妹妹on Cold. Holistic nursing practice, 2016, 30(1): 54-57.
[2] Vonau B, Chard S, Mandalia S, et al. Does the extract of the plant Echinacea purpurea influence the clinical course of recurrent genital herpes? International journ起身安全扶手,al 早洩治療方法,of STD & AIDS, 2001, 12(3): 154-158.
[3] Bauer R, Hoheisel O, Stuhlfauth I, et al. [Extract of the Echinacea purpurea herb: an allopathic phytoi妹妹unostimulant]. Wiener medizinische Wochenschrift, 1999, 149(8-10): 185-189.