RT Journal Article SR Electronic T1 Prophylactic effects of Echinacea purpurea polysaccharide against lethal ocular herpes simplex virus type I JF Saudi Medical Journal JO Saudi Med J FD Prince Sultan Military Medical City SP 1204 OP 1206 VO 29 IS 8 A1 Ghaemi, Amir A1 Soleimanjahi, Hoorieh A1 Gill, Pooria A1 Arefian, Ehsan A1 Soudi, Sara A1 Hassan, Zuhair M. YR 2008 UL http://smj.org.sa/content/29/8/1204.abstract