Erratum: Correction of Acknowledgements

In the published article, “Se Yeon Won, Hannah Kim, Woo Sik Lee, Ji Won Kim, Sung Han Shim. Pre-implantation genetic diagnosis and pre-implantation genetic screening: two years experience at a single center. Obstet Gynecol Sci 2018;61(1):95-101. https://doi.org/10.5468/ogs.2018.61.1.95,” the Acknowledgements was published incorrectly. The authors apologize for any inconvenience that it may have caused