1. The common cold in adults: Treatment and prevention. In: UpToDate, Daniel J Sexton. (Accessed on 2021)
2. Donald Brown. Pelargonium sidoides Extract, Alternative Treatment of Acute Upper Respiratory Tract Infections. Natural
medicine journal, December 2009 Vol. 1 Issue 12.
3. Kolodziej H, Schulz V. EPs 7630: From traditional application to modern phytodrug. Deutsche Apotheker Zeitung. 2003; 143:5564-.
4. Koch E, Wohn C. Pelargonium sidoides root extract EPs 7630 stimulates release antimicrobial peptides from neutrophile granulocytes in human whole blood. Planta Medica. 2007; 73:846.
5. Kolodziej H, Kiderlen AF. In vitro evaluation of antibacterial and immunomodulatory activities of Pelargonium reniforme, Pelargonium sidoides and the related herbal drug preparation EPs® 7630. Phytomedicine. 2007; 14(suppl 1):1826-. 
