Perri, Daniel, Jean-Jacques Dugoua, Daniel Perri, and Gideon Koren. 2018. “Safety and Efficacy of Echinacea (echinacea Angustifolia, E. Purpurea and E. Pallida) During Pregnancy and Lactation”. Journal of Population Therapeutics and Clinical Pharmacology 13 (3). https://www.jptcp.com/index.php/jptcp/article/view/583.