In the article titled “Cytotoxic Effect of Ethanol Extract of Microalga, Chaetoceros calcitrans, and Its Mechanisms in Inducing Apoptosis in Human Breast Cancer Cell Line” [1], the name of the fourth author was given incorrectly as Mehdi Rasoli. The author’s name should have been written as Mehdi R. Pirozyan. The revised authors’ list is shown above.