In the published article, “Soo Ah Kim, Mi Jung Um, Han Kyoung Kim, Suk Jin Kim, Seo Ju Moon, Hyuk Jung. Study of dienogest for dysmenorrhea and pelvic pain associated with endometriosis. Obstet Gynecol Sci 2016;59(6):506-511. https://doi.org/10.5468/ogs.2016.59.6.506,” the author line was published incorrectly. The Editorial Office of Obstet Gynecol Sci would like to correct affiliation of some of the authors as shown below. Changes are marked by underlines. The Editorial Office apologizes for any inconvenience that it may have caused.