Affiliation: | 1. Department of Obstetrics and Gynecology, University of Ulsan College of Medicine, Asan Medical Center, Songpa‐gu, Seoul, Korea;2. Department of Obstetrics and Gynecology, Hallym University Sacred Heart Hospital, Dongan‐gu, Anyang, Korea;3. Department of Convergence Medicine, University of Ulsan College of Medicine, Asan Medical Center, Songpa‐gu, Seoul, Korea |