Sim S, Levine M. AN EVALUATION OF PHARMACIST AND HEALTH FOOD STORE RETAILER’S KNOWLEDGE REGARDING POTENTIONAL DRUG INTERACTIONS ASSOCIATED WITH ST. JOHN’S WORT. J Popl Ther Clin Pharmacol. 2018;17(1). Accessed September 18, 2026. http://www.jptcp.com/index.php/jptcp/article/view/529