Correction to: BMC Pregnancy Childbirth 21, 510 (2021)

https://doi.org/10.1186/s12884-021-03992-2

Following publication of the original article [1], it was noticed that the affiliation of authors were incorrect. The affiliations of each authors are as follows:

Geum Joon Cho 1†; Un Suk Jung 2†; Ho Yeon Kim 1; Soo Bin Lee3; Minjeong Kim 1; Ki-Hoon Ahn 1; Sung Won Han 3; Soon-Cheol Hong1; Hai-Joong Kim 1; Younghan Kim 4*†; Min-Jeong Oh 1*†

1Department of Obstetrics and Gynecology, Korea University College of Medicine, Seoul, Republic of Korea

2Department of Obstetrics and Gynecology, Hanyang University Guri Hospital, College of Medicine, Hanyang University, Seoul, Republic of Korea

3School of Industrial Management Engineering, Korea University, Seoul, Republic of Korea

4Deparment of Obstetrics and Gynecology, Severance Hospital, Yonsei University Health System, Seoul, Republic of Korea

The original article [1] has been updated.