Antiviral activity of the Echinacea purpurea extract Echinaforce® against the highly pathogenic avian influenza virus (H7N9)
2009 ◽
Vol 36
(1)
◽
pp. 65-71
◽
2010 ◽
Vol 10
(7)
◽
pp. 1075-1084
◽
2006 ◽
Vol 151
(7)
◽
pp. 1267-1279
◽