Daneshmehr, Mohammad Ali Providing evidence for use of Echinacea supplements in Hajj pilgrims for management of respiratory tract infections. [electronic resource] - Complementary therapies in clinical practice May 2016 - 40-5 p. digital Publication Type: Journal Article; Review ISSN: 1873-6947 Standard No.: 10.1016/j.ctcp.2016.03.001 doi Subjects--Topical Terms: Dietary SupplementsEchinaceaHolidaysHumansIslamPlant Preparations--adverse effectsRespiratory Tract Infections--drug therapy