Hart A, Dey P. Echinacea for prevention of the common cold: an illustrative overview of how information from different systematic reviews is summarised on the internet. Preventive Medicine. 2009, 49 (2–3): 78–82. PMID 19389422. doi:10.1016/j.ypmed.2009.04.006.
Sachin A Shah; Stephen Sander; C Michael White; Mike Rinaldi; Craig I Coleman. Evaluation of echinacea for the prevention and treatment of the common cold: a meta-analysis. The Lancet Infectious Diseases. July 2007, 7 (7): 473–480. ISSN 1473-3099. PMID 17597571. doi:10.1016/S1473-3099(07)70160-3.
Hart A, Dey P. Echinacea for prevention of the common cold: an illustrative overview of how information from different systematic reviews is summarised on the internet. Preventive Medicine. 2009, 49 (2–3): 78–82. PMID 19389422. doi:10.1016/j.ypmed.2009.04.006.
Sachin A Shah; Stephen Sander; C Michael White; Mike Rinaldi; Craig I Coleman. Evaluation of echinacea for the prevention and treatment of the common cold: a meta-analysis. The Lancet Infectious Diseases. July 2007, 7 (7): 473–480. ISSN 1473-3099. PMID 17597571. doi:10.1016/S1473-3099(07)70160-3.
Echinacea. National Center for Complementary and Integrative Health. [2018-10-20]. (原始内容存档于2015-07-05).
worldcat.org
Sachin A Shah; Stephen Sander; C Michael White; Mike Rinaldi; Craig I Coleman. Evaluation of echinacea for the prevention and treatment of the common cold: a meta-analysis. The Lancet Infectious Diseases. July 2007, 7 (7): 473–480. ISSN 1473-3099. PMID 17597571. doi:10.1016/S1473-3099(07)70160-3.